Carbon and its Compounds is a chapter in the CBSE Class 10 Science syllabus from Science. This chapter hub brings together revision notes, practice questions, worksheets, flashcards, formula sheet to help students learn, practice, and revise Carbon and its Compounds effectively.

Scroll down to find Carbon and its Compounds notes, practice questions, worksheets, and revision resources — all in one place. Use the sidebar to jump to any section, or browse the full page below.

Carbon and its Compounds

NCERT Class 10 Science Chapter 4: Carbon and its Compounds (Pages 58–78)

Summary of Carbon and its Compounds

Playing 00:00 / 00:00

Carbon and its Compounds at a Glance

Board

CBSE

Class

Class 10

Subject

Science

Book

Science

Chapter

4

Pages

5878

Resources

7 study resources

Carbon and its Compounds Summary

In this chapter, students will learn about the fascinating element carbon, which is fundamental to all living organisms and many products we use daily. Carbon has unique properties that allow it to form a remarkable number of compounds—more than all other elements combined. This versatility stems from carbon’s tetravalency, allowing it to form strong bonds with other atoms, including itself, leading to complex structures such as chains, rings, and branches. The chapter begins with an introduction to the covalent bonding of carbon and the formation of simple molecules like methane, ethane, and various hydrocarbons. The exploration continues with the unique nature of carbon compounds, including saturated and unsaturated compounds. Students will learn about isomerism, where compounds share the same molecular formula but have different structures, showcasing carbon's ability for structural diversity. Important distinctions between these compounds help explain their various physical and chemical properties, which are influenced by functional groups attached to the carbon skeleton. Moreover, students will delve into the chemical properties of carbon compounds, especially how they react during combustion, oxidation, and the addition of other elements. Key reactions such as combustion releasing energy, and the oxidation of alcohols to acids will be demonstrated through experiments. The chapter will highlight essential carbon compounds like ethanol and ethanoic acid, which have significant industrial use and impact on our daily lives. Finally, the discussion turns to the role of soaps and detergents as important applications of carbon compounds. Students will understand how the unique properties of soap molecules allow them to clean effectively by forming micelles, which trap oily dirt and allow it to be washed away in water. This comprehensive overview of carbon and its compounds illustrates not only its chemical significance but also its role in our everyday lives.

Carbon and its Compounds Revision Guide

Download the Carbon and its Compounds revision guide with key points, summaries, and quick revision notes for CBSE Class 10 Science.

Key Points

1

Define covalent bond with example.

A covalent bond is formed by the sharing of electron pairs between atoms. Example: H2 molecule where two hydrogen atoms share electrons.

2

Explain tetravalency of carbon.

Carbon has four valence electrons, enabling it to form four covalent bonds with other atoms, leading to a vast variety of compounds.

3

What is catenation?

Catenation is the ability of carbon to form bonds with other carbon atoms, creating long chains, branched chains, or rings.

4

Difference between saturated and unsaturated hydrocarbons.

Saturated hydrocarbons have single bonds (alkanes), while unsaturated have double/triple bonds (alkenes/alkynes). Example: Ethane (C2H6) vs Ethene (C2H4).

5

Homologous series definition.

A series of compounds with the same functional group, differing by CH2 unit. Example: Methane, Ethane, Propane in alkanes.

6

Functional groups in carbon compounds.

Groups like -OH (alcohol), -CHO (aldehyde), -COOH (carboxylic acid) determine the compound's properties.

7

Combustion of carbon compounds.

Carbon compounds burn in oxygen to produce CO2, H2O, heat, and light. Example: CH4 + 2O2 → CO2 + 2H2O + heat.

8

Oxidation reactions of alcohols.

Alcohols oxidize to aldehydes then carboxylic acids. Example: Ethanol → Ethanal → Ethanoic acid.

9

Addition reaction in unsaturated hydrocarbons.

Unsaturated hydrocarbons add hydrogen in presence of catalysts. Example: Ethene + H2 → Ethane (Ni catalyst).

10

Substitution reaction in alkanes.

Alkanes undergo substitution with halogens in sunlight. Example: CH4 + Cl2 → CH3Cl + HCl (in sunlight).

11

Properties of ethanol.

Ethanol is a liquid at room temp, soluble in water, used in drinks and medicines. Reacts with Na to form H2.

12

Properties of ethanoic acid.

Ethanoic acid is a weak acid, smells like vinegar, reacts with bases/carbonates to form salts, CO2, and water.

13

Esterification reaction.

Alcohol + carboxylic acid → Ester + water. Example: Ethanol + Ethanoic acid → Ethyl ethanoate + water.

14

Saponification reaction.

Esters react with NaOH to form soap (salt of fatty acid) and glycerol. Used in soap making.

15

Soap micelles formation.

Soap molecules form micelles in water, with hydrophobic tails inward and hydrophilic heads outward, emulsifying dirt.

16

Hard water and soap reaction.

Hard water contains Ca2+/Mg2+ ions that react with soap to form insoluble scum, reducing cleaning efficiency.

17

Detergents vs soaps.

Detergents are ammonium/sulphonate salts, work in hard water, don’t form scum, used in shampoos/laundry.

18

Allotropes of carbon.

Carbon exists in different forms like diamond (hard), graphite (conducts electricity), and fullerene (C60).

19

Test for unsaturated hydrocarbons.

Bromine water test: Unsaturated compounds decolorize bromine water (orange to colorless).

20

Importance of carbon compounds.

Carbon compounds are essential in fuels, medicines, plastics, and life processes due to their versatile bonding.

Carbon and its Compounds Practice Questions & Answers

Practice important questions and exam-style problems from Carbon and its Compounds. These questions cover key topics from the CBSE Class 10 Science syllabus.

How to practice: Start with the questions below to test your understanding of Carbon and its Compounds. Use the revision guide to review concepts you find difficult, then come back and retry the questions for better retention.

View all 428 Carbon and its Compounds questions
Q9

What happens when saturated hydrocarbons are burnt?

Single Answer MCQ
Q-00001536
View explanation
Q10

How do unsaturated carbon compounds differ in terms of combustion?

Single Answer MCQ
Q-00001537
View explanation
Q11

Explain the importance of air supply in combustion.

Single Answer MCQ
Q-00001538
View explanation
Q12

What pollutants are formed during the combustion of fuels like coal and petroleum?

Single Answer MCQ
Q-00001539
View explanation
Q13

Why do substances burn with or without a flame?

Single Answer MCQ
Q-00001540
View explanation
Q14

How are coal and petroleum formed?

Single Answer MCQ
Q-00001541
View explanation
Q15

Why are coal and petroleum called fossil fuels?

Single Answer MCQ
Q-00001542
View explanation
Q16

What is oxidation and how does it relate to carbon compounds?

Single Answer MCQ
Q-00001543
View explanation
Q17

What are oxidising agents and how do they work?

Single Answer MCQ
Q-00001544
View explanation
Q18

What happens when ethanol is oxidised with alkaline potassium permanganate?

Single Answer MCQ
Q-00001545
View explanation
Q19

How do carbon compounds react during combustion?

Single Answer MCQ
Q-00001546
View explanation
Q20

What is the role of bacteria in the formation of oil and gas?

Single Answer MCQ
Q-00001547
View explanation
Q21

How do carbon compounds differ in terms of conductivity compared to ionic compounds?

Single Answer MCQ
Q-00001548
View explanation
Q22

What is the distribution of electrons in the various shells of carbon?

Single Answer MCQ
Q-00001549
View explanation
Q23

How do carbon compounds differ in terms of melting and boiling points compared to ionic compounds?

Single Answer MCQ
Q-00001550
View explanation
Q24

How does carbon overcome the problem of gaining or losing electrons to achieve noble gas configuration?

Single Answer MCQ
Q-00001551
View explanation
Q25

What test can be conducted to observe the nature of the flame when burning carbon compounds?

Single Answer MCQ
Q-00001552
View explanation
Q26

What is the percentage of carbon in the earth's crust and atmosphere?

Single Answer MCQ
Q-00001830
View explanation
Q27

Why are most carbon compounds poor conductors of electricity?

Single Answer MCQ
Q-00001831
View explanation
Q28

How does carbon achieve noble gas configuration?

Single Answer MCQ
Q-00001832
View explanation
Q29

Explain the bonding in carbon compounds.

Single Answer MCQ
Q-00001833
View explanation
Q30

What is the electronic configuration of carbon?

Single Answer MCQ
Q-00001834
View explanation
Q31

How do elements form molecules by sharing electrons?

Single Answer MCQ
Q-00001835
View explanation
Q32

Describe the properties of some carbon compounds in terms of melting and boiling points.

Single Answer MCQ
Q-00001836
View explanation
Q33

What is the simplest molecule formed by sharing valence electrons?

Single Answer MCQ
Q-00001837
View explanation
Q34

What happens when saturated hydrocarbons are burnt?

Single Answer MCQ
Q-00001838
View explanation
Q35

How do unsaturated carbon compounds differ in terms of combustion?

Single Answer MCQ
Q-00001839
View explanation
Q36

Explain the formation of oxides of sulphur and nitrogen during combustion.

Single Answer MCQ
Q-00001840
View explanation
Q37

Why do substances burn with or without a flame?

Single Answer MCQ
Q-00001841
View explanation
Q38

How are coal and petroleum formed?

Single Answer MCQ
Q-00001842
View explanation
Q39

Why are coal and petroleum called fossil fuels?

Single Answer MCQ
Q-00001843
View explanation
Q40

What is the process of oxidation in carbon compounds?

Single Answer MCQ
Q-00001844
View explanation
Q41

What are oxidising agents and how do they work?

Single Answer MCQ
Q-00001845
View explanation
Q42

What is the chemical formula of acetic acid?

Single Answer MCQ
Q-00001846
View explanation
Q43

How does carbon overcome the problem of gaining or losing electrons?

Single Answer MCQ
Q-00001847
View explanation
Q44

What is the distribution of electrons in various shells of carbon?

Single Answer MCQ
Q-00001848
View explanation
Q45

How do carbon compounds differ from ionic compounds in terms of properties?

Single Answer MCQ
Q-00001849
View explanation
Q46

What is the product of burning a compound containing carbon?

Single Answer MCQ
Q-00001850
View explanation
Q47

How do carbon compounds behave when burnt?

Single Answer MCQ
Q-00001851
View explanation
Q48

What is the significance of carbon in various everyday items?

Single Answer MCQ
Q-00001852
View explanation
Q49

How do carbon compounds contribute to pollution in the environment?

Single Answer MCQ
Q-00001853
View explanation
Q50

How does the combustion of fuels like coal and petroleum impact the environment?

Single Answer MCQ
Q-00001854
View explanation
Q51

What is the percentage of carbon in the earth's crust and atmosphere?

Single Answer MCQ
Q-00002068
View explanation
Q52

Why are most carbon compounds poor conductors of electricity?

Single Answer MCQ
Q-00002069
View explanation
Q53

How does carbon achieve noble gas configuration?

Single Answer MCQ
Q-00002070
View explanation
Q54

Explain the bonding in carbon compounds.

Single Answer MCQ
Q-00002071
View explanation
Q55

What is the electronic configuration of carbon?

Single Answer MCQ
Q-00002072
View explanation
Q56

How do elements form molecules by sharing electrons?

Single Answer MCQ
Q-00002073
View explanation
Q57

Describe the properties of some carbon compounds in terms of melting and boiling points.

Single Answer MCQ
Q-00002074
View explanation
Q58

What is the simplest molecule formed by sharing valence electrons?

Single Answer MCQ
Q-00002075
View explanation
Q59

What happens when saturated hydrocarbons are burnt?

Single Answer MCQ
Q-00002076
View explanation
Q60

How do unsaturated carbon compounds differ in terms of combustion?

Single Answer MCQ
Q-00002077
View explanation
Q61

Explain the formation of oxides of sulphur and nitrogen during combustion.

Single Answer MCQ
Q-00002078
View explanation
Q62

Why do substances burn with or without a flame?

Single Answer MCQ
Q-00002079
View explanation
Q63

How are coal and petroleum formed?

Single Answer MCQ
Q-00002080
View explanation
Q64

Why are coal and petroleum called fossil fuels?

Single Answer MCQ
Q-00002081
View explanation
Q65

What is the process of oxidation in carbon compounds?

Single Answer MCQ
Q-00002082
View explanation
Q66

What are oxidising agents and how do they work?

Single Answer MCQ
Q-00002083
View explanation
Q67

How does alkaline potassium permanganate oxidise alcohols?

Single Answer MCQ
Q-00002084
View explanation
Q68

What is the product when alcohols are oxidised to carboxylic acids?

Single Answer MCQ
Q-00002085
View explanation
Q69

How do carbon compounds react on combustion?

Single Answer MCQ
Q-00002086
View explanation
Q70

What are the properties of ionic compounds compared to carbon compounds?

Single Answer MCQ
Q-00002087
View explanation
Q71

How does carbon overcome the problem of gaining or losing electrons?

Single Answer MCQ
Q-00002088
View explanation
Q72

What is the distribution of electrons in various shells of carbon?

Single Answer MCQ
Q-00002089
View explanation
Q73

How do shared electrons lead to noble gas configuration in molecules?

Single Answer MCQ
Q-00002090
View explanation
Q74

What is the significance of the boiling and melting points of carbon compounds?

Single Answer MCQ
Q-00002091
View explanation
Q75

How does incomplete combustion result in soot formation?

Single Answer MCQ
Q-00002092
View explanation
Q76

What is the percentage of carbon in the earth's crust?

Single Answer MCQ
Q-00002510
View explanation
Q77

Why are most carbon compounds poor conductors of electricity?

Single Answer MCQ
Q-00002511
View explanation
Q78

How does carbon achieve noble gas configuration?

Single Answer MCQ
Q-00002512
View explanation
Q79

Explain the bonding in carbon compounds.

Single Answer MCQ
Q-00002513
View explanation
Q80

What is the electronic configuration of carbon?

Single Answer MCQ
Q-00002514
View explanation
Q81

How do saturated hydrocarbons differ from unsaturated carbon compounds in terms of combustion?

Single Answer MCQ
Q-00002515
View explanation
Q82

What are the major pollutants formed during the combustion of fuels like coal and petroleum?

Single Answer MCQ
Q-00002516
View explanation
Q83

Why do substances burn with or without a flame?

Single Answer MCQ
Q-00002517
View explanation
Q84

How are coal and petroleum formed?

Single Answer MCQ
Q-00002518
View explanation
Q85

Why are coal and petroleum called fossil fuels?

Single Answer MCQ
Q-00002519
View explanation
Q86

What is the process of oxidation in carbon compounds?

Single Answer MCQ
Q-00002520
View explanation
Q87

What are oxidising agents and give an example?

Single Answer MCQ
Q-00002521
View explanation
Q88

How do carbon compounds react with alkaline potassium permanganate?

Single Answer MCQ
Q-00002522
View explanation
Q89

What is the product when a compound containing carbon is burnt?

Single Answer MCQ
Q-00002523
View explanation
Q90

How do carbon compounds differ from ionic compounds in terms of melting and boiling points?

Single Answer MCQ
Q-00002524
View explanation
Q91

What is the valence electron configuration of carbon?

Single Answer MCQ
Q-00002525
View explanation
Q92

How does carbon overcome the problem of gaining or losing electrons to achieve noble gas configuration?

Single Answer MCQ
Q-00002526
View explanation
Q93

What are some common items that are based on carbon?

Single Answer MCQ
Q-00002527
View explanation
Q94

How does carbon form molecules with other elements?

Single Answer MCQ
Q-00002528
View explanation
Q95

What are the properties of carbon that make it important to us?

Single Answer MCQ
Q-00002529
View explanation
Q96

How does the nature of bonding in carbon compounds affect their properties?

Single Answer MCQ
Q-00002530
View explanation
Q97

What are some simple molecules formed by the sharing of valence electrons?

Single Answer MCQ
Q-00002531
View explanation
Q98

How do you test if a compound contains carbon?

Single Answer MCQ
Q-00002532
View explanation
Q99

What happens when ethanol is warmed with alkaline potassium permanganate?

Single Answer MCQ
Q-00002533
View explanation
Q100

How does the color of potassium permanganate change during the oxidation of ethanol?

Single Answer MCQ
Q-00002534
View explanation
Q101

What type of bond is formed when carbon shares its valence electrons with other atoms?

Single Answer MCQ
Q-00004337
View explanation
Q102

How many valence electrons does a carbon atom have?

Single Answer MCQ
Q-00004338
View explanation
Q103

Which of the following carbon compounds is a good example of covalent bonding?

Single Answer MCQ
Q-00004339
View explanation
Q104

What happens to the bonding in carbon compounds when they are melted?

Single Answer MCQ
Q-00004340
View explanation
Q105

Which of the following statements correctly describes covalent bonds in carbon?

Single Answer MCQ
Q-00004341
View explanation
Q106

What is the typical bond angle in methane (CH₄) due to its tetrahedral structure?

Single Answer MCQ
Q-00004342
View explanation
Q107

Which of the following best describes the physical state of most covalent carbon compounds at room temperature?

Single Answer MCQ
Q-00004343
View explanation
Q108

Why are carbon compounds generally poor conductors of electricity?

Single Answer MCQ
Q-00004344
View explanation
Q109

What is produced when carbon burns in the presence of sufficient oxygen?

Single Answer MCQ
Q-00004345
View explanation
Q110

Which of the following carbon compounds has the highest boiling point?

Single Answer MCQ
Q-00004346
View explanation
Q111

Which of the following compounds is likely to burn with a sooty flame?

Single Answer MCQ
Q-00004347
View explanation
Q112

Carbon's ability to form long chains of covalent bonds is due to its:

Single Answer MCQ
Q-00004348
View explanation
Q113

What does the combustion of hydrocarbons mainly generate?

Single Answer MCQ
Q-00004349
View explanation
Q114

What is the primary factor determining the shape of a simple carbon compound?

Single Answer MCQ
Q-00004350
View explanation
Q115

When ethanol is oxidized, which compound is produced?

Single Answer MCQ
Q-00004351
View explanation
Q116

Which of the following is a covalent molecule that contains only carbon and hydrogen?

Single Answer MCQ
Q-00004352
View explanation
Q117

What is the main pollutant produced from burning carbon-based fuels?

Single Answer MCQ
Q-00004353
View explanation
Q118

In carbon compounds, shared electrons are best described as:

Single Answer MCQ
Q-00004354
View explanation
Q119

Which reaction illustrates the complete oxidation of methane?

Single Answer MCQ
Q-00004355
View explanation
Q120

What type of molecular structure does a carbon compound like graphite exhibit?

Single Answer MCQ
Q-00004356
View explanation
Q121

What kind of flame is produced during incomplete combustion?

Single Answer MCQ
Q-00004357
View explanation
Q122

In organic chemistry, which factor primarily influences the reactivity of carbon compounds?

Single Answer MCQ
Q-00004358
View explanation
Q123

Which of the following carbon compounds cannot undergo oxidation to form a carboxylic acid?

Single Answer MCQ
Q-00004359
View explanation
Q124

Which of the following is a common misconception about carbon bonding?

Single Answer MCQ
Q-00004360
View explanation
Q125

Saturated hydrocarbons are characterized by which type of bonds?

Single Answer MCQ
Q-00004361
View explanation
Q126

What is the typical product of burning alcohols?

Single Answer MCQ
Q-00004362
View explanation
Q127

Which property of ethanoic acid makes it a weak acid?

Single Answer MCQ
Q-00004363
View explanation
Q128

Combustion reactions of organic compounds release energy in the form of:

Single Answer MCQ
Q-00004364
View explanation
Q129

Which process refers to the reaction of organic compounds with oxygen?

Single Answer MCQ
Q-00004365
View explanation
Q130

When subjected to heat, what do alkanes primarily yield?

Single Answer MCQ
Q-00004366
View explanation
Q131

What is the importance of knowing the combustion properties of carbon compounds?

Single Answer MCQ
Q-00004367
View explanation
Q132

Which of the following best explains why fossil fuels are a major source of energy?

Single Answer MCQ
Q-00004368
View explanation
Q133

What is the chemical formula of ethanol?

Single Answer MCQ
Q-00004369
View explanation
Q134

Ethanol is commonly referred to as which of the following?

Single Answer MCQ
Q-00004370
View explanation
Q135

Which of the following is a primary use of ethanol in medicines?

Single Answer MCQ
Q-00004371
View explanation
Q136

What type of reaction occurs when ethanol is oxidized to form ethanoic acid?

Single Answer MCQ
Q-00004372
View explanation
Q137

When sodium reacts with ethanol, which gas is released?

Single Answer MCQ
Q-00004373
View explanation
Q138

What product is formed when ethanol is dehydrated using concentrated sulfuric acid?

Single Answer MCQ
Q-00004374
View explanation
Q139

Which of the following is a property of ethanoic acid?

Single Answer MCQ
Q-00004376
View explanation
Q140

What happens during the oxidation of ethanol in the body?

Single Answer MCQ
Q-00004378
View explanation
Q141

Why is methanol considered more dangerous than ethanol?

Single Answer MCQ
Q-00004380
View explanation
Q142

What is denatured alcohol?

Single Answer MCQ
Q-00004382
View explanation
Q143

In the reaction of ethanol with sodium, what is the other product formed along with hydrogen?

Single Answer MCQ
Q-00004384
View explanation
Q144

What is the main characteristic of a substitution reaction, as seen with chlorine and alkanes?

Single Answer MCQ
Q-00004386
View explanation
Q145

What is the primary role of catalysts in reactions involving ethanol?

Single Answer MCQ
Q-00004388
View explanation
Q146

What type of compound is ethanoic acid classified as?

Single Answer MCQ
Q-00004390
View explanation
Q147

In terms of solvent properties, what is a significant advantage of ethanol?

Single Answer MCQ
Q-00004392
View explanation
Q148

Which reaction type describes the conversion of ethene back into ethanol?

Single Answer MCQ
Q-00004394
View explanation
Q149

What is the primary function of soap in cleaning?

Single Answer MCQ
Q-00004419
View explanation
Q150

How do soap molecules behave in water?

Single Answer MCQ
Q-00004422
View explanation
Q151

Which part of a soap molecule is hydrophilic?

Single Answer MCQ
Q-00004426
View explanation
Q152

What is the role of water in the cleaning action of soap?

Single Answer MCQ
Q-00004429
View explanation
Q153

What type of compound is soap typically classified as?

Single Answer MCQ
Q-00004431
View explanation
Q154

Why does soap form micelles in water?

Single Answer MCQ
Q-00004435
View explanation
Q155

What is the main component of soap?

Single Answer MCQ
Q-00004438
View explanation
Q156

What effect does hard water have on soap?

Single Answer MCQ
Q-00004442
View explanation
Q157

What is the structure formed when soap is mixed with water?

Single Answer MCQ
Q-00004446
View explanation
Q158

During which process are soaps formed?

Single Answer MCQ
Q-00004450
View explanation
Q159

What ion is responsible for the cleaning action of cationic detergents?

Single Answer MCQ
Q-00004453
View explanation
Q160

Why does a soap solution appear cloudy?

Single Answer MCQ
Q-00004456
View explanation
Q161

Which cleaning agent is typically more effective in hard water than soap?

Single Answer MCQ
Q-00004460
View explanation
Q162

What is the chemical property that enables a detergent to be effective?

Single Answer MCQ
Q-00004462
View explanation
Q163

Which of the following describes the nature of emulsifiers?

Single Answer MCQ
Q-00004464
View explanation
Q164

What type of bond is formed when carbon shares electrons with other atoms?

Single Answer MCQ
Q-00019117
View explanation
Q165

How many valence electrons does a carbon atom have?

Single Answer MCQ
Q-00019118
View explanation
Q166

Which of the following compounds demonstrates a typical covalent bond?

Single Answer MCQ
Q-00019119
View explanation
Q167

When carbon forms a covalent bond, what does it tend to achieve?

Single Answer MCQ
Q-00019120
View explanation
Q168

Why are covalent compounds typically poor conductors of electricity?

Single Answer MCQ
Q-00019121
View explanation
Q169

How does carbon typically achieve a stable electron configuration?

Single Answer MCQ
Q-00019122
View explanation
Q170

Which of the following statements is true regarding the covalent bond?

Single Answer MCQ
Q-00019123
View explanation
Q171

Which molecule contains a double covalent bond?

Single Answer MCQ
Q-00019124
View explanation
Q172

What product is primarily formed when carbon burns in oxygen?

Single Answer MCQ
Q-00019125
View explanation
Q173

What is the geometry of a methane (CH4) molecule?

Single Answer MCQ
Q-00019126
View explanation
Q174

Which type of combustion produces soot?

Single Answer MCQ
Q-00019127
View explanation
Q175

Which statement about carbon's bonding capability is correct?

Single Answer MCQ
Q-00019128
View explanation
Q176

Which alcohol is oxidized to form a carboxylic acid?

Single Answer MCQ
Q-00019129
View explanation
Q177

Which property is NOT characteristic of covalent compounds?

Single Answer MCQ
Q-00019130
View explanation
Q178

Which flame indicates the presence of carbon particles due to incomplete combustion?

Single Answer MCQ
Q-00019131
View explanation
Q179

Carbon's ability to form stable covalent bonds is mainly due to which factor?

Single Answer MCQ
Q-00019132
View explanation
Q180

What happens to potassium permanganate in the presence of ethanol during oxidation?

Single Answer MCQ
Q-00019133
View explanation
Q181

In covalent bonding, the shared electrons are considered to belong to:

Single Answer MCQ
Q-00019134
View explanation
Q182

Which of the following carbon compounds is likely to exhibit a clean flame upon combustion?

Single Answer MCQ
Q-00019135
View explanation
Q183

What type of molecular structure is typical of covalent compounds?

Single Answer MCQ
Q-00019136
View explanation
Q184

What is a product of combustion of hydrocarbons containing nitrogen?

Single Answer MCQ
Q-00019137
View explanation
Q185

What is the primary reason carbon is essential for life?

Single Answer MCQ
Q-00019138
View explanation
Q186

What distinguishes saturated hydrocarbons from unsaturated ones during combustion?

Single Answer MCQ
Q-00019139
View explanation
Q187

Which form of carbon does NOT exhibit covalent bonding?

Single Answer MCQ
Q-00019140
View explanation
Q188

What is the main reason for the yellow color in a candle flame?

Single Answer MCQ
Q-00019141
View explanation
Q189

What type of reaction occurs when an alcohol is oxidized to form a carbonyl compound?

Single Answer MCQ
Q-00019142
View explanation
Q190

How does the presence of air supply affect combustion?

Single Answer MCQ
Q-00019143
View explanation
Q191

What will happen if fuels with sulfur are burned in air?

Single Answer MCQ
Q-00019144
View explanation
Q192

Which statement is correct about the combustion of hydrocarbons?

Single Answer MCQ
Q-00019145
View explanation
Q193

In the reaction of ethanol with oxygen, which product indicates complete oxidation?

Single Answer MCQ
Q-00019146
View explanation
Q194

When ethene burns in limited oxygen, which compound is likely to be produced?

Single Answer MCQ
Q-00019147
View explanation
Q195

What kind of carbon compounds are most likely to produce nitrogen oxides when combusted?

Single Answer MCQ
Q-00019148
View explanation
Q196

What is the main function of soap in cleaning?

Single Answer MCQ
Q-00019149
View explanation
Q197

What structure do soap molecules form in water to facilitate cleaning?

Single Answer MCQ
Q-00019150
View explanation
Q198

Which component of soap is responsible for its cleaning action?

Single Answer MCQ
Q-00019151
View explanation
Q199

Detergents are used instead of soap in hard water because they do not form what?

Single Answer MCQ
Q-00019152
View explanation
Q200

Which part of a soap molecule is hydrophilic?

Single Answer MCQ
Q-00019153
View explanation
Q201

The cleaning action of detergents relies primarily on their ability to do what?

Single Answer MCQ
Q-00019154
View explanation
Q202

What type of emulsion do soap molecules help form when mixed with oil and water?

Single Answer MCQ
Q-00019155
View explanation
Q203

Which process describes how soap can remove oily stains from a surface?

Single Answer MCQ
Q-00019156
View explanation
Q204

Which functional group is commonly found in soap molecules?

Single Answer MCQ
Q-00019157
View explanation
Q205

What common household substance initially reacts with oils to provide cleaning action?

Single Answer MCQ
Q-00019158
View explanation
Q206

Soap made from which of the following is often used in personal care products?

Single Answer MCQ
Q-00019159
View explanation
Q207

What type of bond is primarily involved in the structure of soap molecules?

Single Answer MCQ
Q-00019160
View explanation
Q208

Which of the following best describes the hydrophobic part of a soap molecule?

Single Answer MCQ
Q-00019161
View explanation
Q209

What is the primary reason that hard water limits the effectiveness of soap?

Single Answer MCQ
Q-00019162
View explanation
Q210

Which of the following is an effect of adding salt to soap solutions?

Single Answer MCQ
Q-00019163
View explanation
Q211

What type of reaction occurs when ethanol is converted to ethanoic acid?

Single Answer MCQ
Q-00019177
View explanation
Q212

What is the primary use of ethanol in the beverage industry?

Single Answer MCQ
Q-00019178
View explanation
Q213

How does ethanol react with sodium?

Single Answer MCQ
Q-00019179
View explanation
Q214

Which chemical reaction leads to the dehydration of ethanol?

Single Answer MCQ
Q-00019180
View explanation
Q215

Why are animal fats considered less healthy compared to vegetable oils?

Single Answer MCQ
Q-00019181
View explanation
Q216

What is denatured alcohol?

Single Answer MCQ
Q-00019182
View explanation
Q217

What type of compound is ethanoic acid?

Single Answer MCQ
Q-00019183
View explanation
Q218

Which is NOT a common application of ethanol?

Single Answer MCQ
Q-00019184
View explanation
Q219

What is the effect of large ethanol consumption on the human body?

Single Answer MCQ
Q-00019185
View explanation
Q220

Which property of ethanol allows it to mix with water?

Single Answer MCQ
Q-00019186
View explanation
Q221

What is the importance of potassium permanganate in the oxidation of ethanol?

Single Answer MCQ
Q-00019187
View explanation
Q222

In what form is ethanol when it is at room temperature?

Single Answer MCQ
Q-00019188
View explanation
Q223

During the reaction of ethanol with concentrated sulfuric acid, what product is formed aside from ethene?

Single Answer MCQ
Q-00019189
View explanation
Q224

What is the reaction type when chlorine replaces hydrogen in hydrocarbons?

Single Answer MCQ
Q-00019190
View explanation
Q225

Why is methanol toxic compared to ethanol?

Single Answer MCQ
Q-00019191
View explanation
Q226

What type of bond is primarily formed between carbon atoms in organic compounds?

Single Answer MCQ
Q-00039980
View explanation
Q227

Which of the following statements is true about covalent compounds?

Single Answer MCQ
Q-00039981
View explanation
Q228

Why does carbon tend to form covalent bonds rather than ionic bonds?

Single Answer MCQ
Q-00039982
View explanation
Q229

Which of these compounds contains only carbon and hydrogen atoms?

Single Answer MCQ
Q-00039983
View explanation
Q230

How is the stable configuration achieved in covalent bonding?

Single Answer MCQ
Q-00039984
View explanation
Q231

What do we call the type of bond formed when two atoms share a pair of electrons?

Single Answer MCQ
Q-00039985
View explanation
Q232

What is the main characteristic of covalent compounds regarding their physical properties?

Single Answer MCQ
Q-00039986
View explanation
Q233

Covalent compounds are often found in which state at room temperature?

Single Answer MCQ
Q-00039987
View explanation
Q234

Which type of bond is responsible for the structure of diamond?

Single Answer MCQ
Q-00039988
View explanation
Q235

In which of the following does carbon exhibit sp3 hybridization?

Single Answer MCQ
Q-00039989
View explanation
Q236

Which of the following is a characteristic of covalent bonds?

Single Answer MCQ
Q-00039990
View explanation
Q237

What happens to the electrons in a covalent bond?

Single Answer MCQ
Q-00039991
View explanation
Q238

Which of the following molecules is formed through double covalent bonds?

Single Answer MCQ
Q-00039992
View explanation
Q239

What type of molecular geometry is formed by methane (CH4)?

Single Answer MCQ
Q-00039993
View explanation
Q240

What is produced when carbon burns in oxygen?

Single Answer MCQ
Q-00040010
View explanation
Q241

Which of the following compounds undergoes complete combustion to release the most energy?

Single Answer MCQ
Q-00040011
View explanation
Q242

What type of flame is produced when a saturated hydrocarbon like hexane is burned?

Single Answer MCQ
Q-00040012
View explanation
Q243

Which carbon compound can be oxidized to form a carboxylic acid?

Single Answer MCQ
Q-00040013
View explanation
Q244

What type of reaction occurs when carbon compounds are burned?

Single Answer MCQ
Q-00040014
View explanation
Q245

Which of the following statements about combustion of hydrocarbons is correct?

Single Answer MCQ
Q-00040015
View explanation
Q246

When a flame produces a lot of smoke, what does it indicate?

Single Answer MCQ
Q-00040016
View explanation
Q247

During the combustion of which of the following would you expect to see a blue flame?

Single Answer MCQ
Q-00040017
View explanation
Q248

What component in fuels like coal and petroleum contributes to their environmental pollutive potential?

Single Answer MCQ
Q-00040018
View explanation
Q249

What is the primary product of the complete combustion of methane?

Single Answer MCQ
Q-00040019
View explanation
Q250

Which chemical change is mainly observed when alcohols are oxidized?

Single Answer MCQ
Q-00040020
View explanation
Q251

What is the effect of incomplete combustion on carbon compounds?

Single Answer MCQ
Q-00040021
View explanation
Q252

Which of the following reactions best describes oxidation of ethanol using potassium permanganate?

Single Answer MCQ
Q-00040022
View explanation
Q253

Why are carbon compounds often favored as fuels?

Single Answer MCQ
Q-00040023
View explanation
Q254

What occurs when carbon compounds are not ignited properly?

Single Answer MCQ
Q-00040024
View explanation
Q255

What type of reaction converts ethanol to ethanoic acid?

Single Answer MCQ
Q-00040025
View explanation
Q256

Which of the following is a property of ethanol?

Single Answer MCQ
Q-00040026
View explanation
Q257

What is produced when ethanol reacts with sodium?

Single Answer MCQ
Q-00040027
View explanation
Q258

What catalyst is commonly used in the dehydration of ethanol to produce ethene?

Single Answer MCQ
Q-00040028
View explanation
Q259

What is a possible consequence of consuming large amounts of ethanol?

Single Answer MCQ
Q-00040029
View explanation
Q260

What is denatured alcohol?

Single Answer MCQ
Q-00040030
View explanation
Q261

Why is ethanol soluble in water in all proportions?

Single Answer MCQ
Q-00040031
View explanation
Q262

Which compound is produced when methanol is oxidized?

Single Answer MCQ
Q-00040032
View explanation
Q263

What is the boiling point state of ethanol at room temperature?

Single Answer MCQ
Q-00040033
View explanation
Q264

What is the structural formula of ethanoic acid?

Single Answer MCQ
Q-00040034
View explanation
Q265

What type of reaction involves the combination of two or more substances to form a single product?

Single Answer MCQ
Q-00040035
View explanation
Q266

What is true about the boiling point of ethanoic acid compared to ethanol?

Single Answer MCQ
Q-00040036
View explanation
Q267

What is the primary use of ethanol in the industry?

Single Answer MCQ
Q-00040037
View explanation
Q268

Which of the following is NOT a reason for ethanol being classified as a solvent?

Single Answer MCQ
Q-00040038
View explanation
Q269

Why can concentrated sulfuric acid be considered a dehydrating agent when used with ethanol?

Single Answer MCQ
Q-00040039
View explanation
Q270

What is the primary function of soap in cleaning?

Single Answer MCQ
Q-00040040
View explanation
Q271

What enables soap to form micelles in water?

Single Answer MCQ
Q-00040041
View explanation
Q272

Which part of the soap molecule interacts with water?

Single Answer MCQ
Q-00040042
View explanation
Q273

What happens when soap is mixed with hard water?

Single Answer MCQ
Q-00040043
View explanation
Q274

How do detergents differ from soaps in terms of composition?

Single Answer MCQ
Q-00040044
View explanation
Q275

Soap molecules can form which type of structure to trap dirt?

Single Answer MCQ
Q-00040045
View explanation
Q276

What role does the hydrophobic tail of soap play?

Single Answer MCQ
Q-00040046
View explanation
Q277

Which type of compound is a common component of soap?

Single Answer MCQ
Q-00040047
View explanation
Q278

In soap-making, which substance is commonly used as a base?

Single Answer MCQ
Q-00040048
View explanation
Q279

What is a characteristic property of soap solutions?

Single Answer MCQ
Q-00040049
View explanation
Q280

Which type of soap is formed by using potassium hydroxide?

Single Answer MCQ
Q-00040050
View explanation
Q281

What can be used to test if a cleaning agent is a soap or detergent?

Single Answer MCQ
Q-00040051
View explanation
Q282

Which of the following is NOT a property of detergents?

Single Answer MCQ
Q-00040052
View explanation
Q283

Soap can be derived from the saponification of which substances?

Single Answer MCQ
Q-00040053
View explanation
Q284

Why are detergent micelles effective in removing oily stains?

Single Answer MCQ
Q-00040054
View explanation
Q285

Which of the following functional group is for carboxylic acid?

Single Answer MCQ
Q-00205846
View explanation
Q286

Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements. Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

Single Answer MCQ
Q-00205849
View explanation
Q287

Give reason: Covalent compounds are poor conductor of electricity.

Text
Q-00205864
View explanation
Q288

Give reason: Carbon shows catenation but silicon does not.

Text
Q-00205865
View explanation
Q289

Give reason: Soap does not form lather in hard water.

Text
Q-00205866
View explanation
Q290

Write chemical equation for oxidation of ethanol by acidified K2Cr2O7.

Text
Q-00205867
View explanation
Q291

Write chemical equation for hydrogenation of ethene.

Text
Q-00205868
View explanation
Q292

Mohan heated ethanol with a compound ‘X’ in the presence of a few drops of conc. H2SO4 and observed a sweet smelling compound ‘Y’ is formed. When ‘Y’ is treated with sodium hydroxide it gives back ethanol and a compound ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’.

Text
Q-00205871
View explanation
Q293

Write the role of conc. H2SO4 in this reaction.

Text
Q-00205869
View explanation
Q294

Write the chemical equations involved and name the reactions.

Text
Q-00205870
View explanation
Q295

The hydrocarbons with general formula CnH2n represents:

Single Answer MCQ
Q-00205932
View explanation
Q296

Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements. Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

Single Answer MCQ
Q-00205936
View explanation
Q297

Give reason: Soap does not form lather in hard water.

Text
Q-00205949
View explanation
Q298

Give reason: Covalent compounds are poor conductor of electricity.

Text
Q-00205950
View explanation
Q299

Give reason: Carbon shows catenation but silicon does not.

Text
Q-00205951
View explanation
Q300

Write chemical equation for oxidation of ethanol by acidified K2Cr2O7.

Text
Q-00205952
View explanation
Q301

Write chemical equation for hydrogenation of ethene.

Text
Q-00205953
View explanation
Q302

Mohan heated ethanol with a compound ‘X’ in the presence of a few drops of conc. H2SO4 and observed a sweet smelling compound ‘Y’ is formed. When ‘Y’ is treated with sodium hydroxide it gives back ethanol and a compound ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’.

Text
Q-00205954
View explanation
Q303

In the reaction of ethanol with compound ‘X’ in the presence of conc. H2SO4, write the role of conc. H2SO4.

Text
Q-00205956
View explanation
Q304

In the reaction of ethanol with compound ‘X’ and subsequent reaction of ‘Y’ with sodium hydroxide, write the chemical equations involved and name the reactions.

Text
Q-00205957
View explanation
Q305

Assertion (A): Carbon compounds can form chains, branched and ring structures. Reason (R): Carbon exhibits the property of catenation.

Single Answer MCQ
Q-00206012
View explanation
Q306

A carbon compound P of molecular formula C2H6O is neutral to litmus and reacts with sodium metal to produce a gas that burns with a pop sound. Identify compound P.

Text
Q-00206026
View explanation
Q307

What is the role of concentrated H2SO4 in this reaction?

Text
Q-00206027
View explanation
Q308

Compound P is heated with concentrated H2SO4 at 443 K to produce compound Q. Write the chemical equation for the reaction.

Text
Q-00206028
View explanation
Q309

What is likely to be observed on heating compound P with ethanoic acid with an acid as catalyst? Write the chemical equation for the reaction.

Text
Q-00206029
View explanation
Q310

Write the structural formula of benzene.

Text
Q-00206030
View explanation
Q311

State the reason why carbon can neither form C4+ cation nor C4- anion.

Text
Q-00206031
View explanation
Q312

What type of bond is formed between carbon and hydrogen?

Text
Q-00206032
View explanation
Q313

How is ethanol converted to ethanoic acid?

Text
Q-00206033
View explanation
Q314

Complete the chemical equation: CH3COOC2H5 + NaOH ->

Text
Q-00206035
View explanation
Q315

Assertion (A): Carbon shows the property of catenation. Reason (R): C – C bond is weak due to its small size.

Single Answer MCQ
Q-00206092
View explanation
Q316

A carbon compound ‘P’ of molecular formula C2H6O is neutral to red and blue litmus and produces a gas that burns with a pop sound when sodium metal reacts with it. Identify compound ‘P’.

Text
Q-00206108
View explanation
Q317

The carbon compound ‘P’ is heated with conc. H2SO4 at 443 K to produce compound ‘Q’. Write the chemical equation for the reaction.

Text
Q-00206110
View explanation
Q318

What is the role of conc. H2SO4 in this reaction?

Text
Q-00206109
View explanation
Q319

What is likely to be observed on heating compound ‘P’ with ethanoic acid with an acid as a catalyst? Write the chemical equation for the reaction.

Text
Q-00206111
View explanation
Q320

State the reason why carbon can neither form C4+ cation nor C4− anion.

Text
Q-00206112
View explanation
Q321

What type of bond is formed between carbon and hydrogen?

Text
Q-00206113
View explanation
Q322

Write the structural formula of benzene.

Text
Q-00206114
View explanation
Q323

How is ethanol converted to ethanoic acid?

Text
Q-00206115
View explanation
Q324

Complete the following chemical equation: CH3COOC2H5 + NaOH →

Text
Q-00206116
View explanation
Q325

Assertion (A): Carbon shows the property of catenation. Reason (R): This is due to strong C – C bond.

Single Answer MCQ
Q-00206233
View explanation
Q326

A carbon compound ‘P’ of molecular formula C2H6O is neutral to red and blue litmus. A gas that burns with a pop sound is produced when sodium metal reacts with compound ‘P’. Identify compound ‘P’.

Text
Q-00206249
View explanation
Q327

The carbon compound ‘P’ is heated with conc. H2SO4 at 443 K to produce compound ‘Q’. Write the chemical equation for the reaction.

Text
Q-00206250
View explanation
Q328

What is the role of conc. H2SO4 in this reaction?

Text
Q-00206251
View explanation
Q329

What is likely to be observed on heating compound ‘P’ with ethanoic acid with an acid as a catalyst? Write the chemical equation for the reaction.

Text
Q-00206252
View explanation
Q330

Write the structural formula of benzene.

Text
Q-00206253
View explanation
Q331

State the reason why carbon can neither form C4+ cation nor C4− anion.

Text
Q-00206254
View explanation
Q332

What type of bond is formed between carbon and hydrogen?

Text
Q-00206255
View explanation
Q333

How is ethanol converted to ethanoic acid?

Text
Q-00206256
View explanation
Q334

Complete the following chemical equation: CH3COOC2H5 + NaOH →

Text
Q-00206257
View explanation
Q335

Consider the structures ‘X’ and ‘Y’ given below. Which of the following statements are correct? (i) ‘X’ and ‘Y’ are homologues. (ii) ‘X’ and ‘Y’ have the same structural formula, but different molecular formula. (iii) ‘X’ and ‘Y’ have the same molecular formula, but different structural formula. (iv) ‘X’ and ‘Y’ are structural isomers.

Single Answer MCQ
Q-00206310
View explanation
Q336

What is homologous series? Which two of the following organic compounds belong to the same homologous series? C2H4, C4H10, C3H4, C4H8.

Text
Q-00206327
View explanation
Q337

Write the product(s): CH3-CH2-OH + CH3COOH → in the presence of acid.

Text
Q-00206329
View explanation
Q338

Write the product(s): C2H5OH + O2 → on burning.

Text
Q-00206330
View explanation
Q339

Why does micelle formation take place when soap is added to water?

Text
Q-00206331
View explanation
Q340

Name the compound: CH3-CO-CH3.

Text
Q-00206332
View explanation
Q341

Name the reaction which is commonly used in the conversion of vegetable oils to fats.

Text
Q-00206333
View explanation
Q342

Why is the melting point of C4H10 higher than C3H8?

Text
Q-00206334
View explanation
Q343

Name the compound: CH3-C≡CH.

Text
Q-00206335
View explanation
Q344

Write the products: CH3COOC2H5 + NaOH →

Text
Q-00206336
View explanation
Q345

What happens when a piece of sodium is dropped into ethanol?

Text
Q-00206337
View explanation
Q346

The formula of functional group for aldehyde is:

Single Answer MCQ
Q-00206400
View explanation
Q347

Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements. Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

Single Answer MCQ
Q-00206404
View explanation
Q348

Give reason: Covalent compounds are poor conductors of electricity.

Text
Q-00206416
View explanation
Q349

Give reason: Soap does not form lather in hard water.

Text
Q-00206418
View explanation
Q350

Give reason: Carbon shows catenation but silicon does not.

Text
Q-00206419
View explanation
Q351

Write chemical equation: Oxidation of ethanol by acidified K2Cr2O7.

Text
Q-00206420
View explanation
Q352

Write chemical equation: Hydrogenation of ethene.

Text
Q-00206421
View explanation
Q353

Mohan heated ethanol with a compound 'X' in the presence of a few drops of conc. H2SO4 and observed a sweet smelling compound 'Y' is formed. When 'Y' is treated with sodium hydroxide it gives back ethanol and a compound 'Z'. Identify 'X', 'Y' and 'Z'.

Text
Q-00206422
View explanation
Q354

In the reaction of ethanol with compound 'X' in the presence of conc. H2SO4, write the role of conc. H2SO4.

Text
Q-00206423
View explanation
Q355

Write the chemical equations involved and name the reactions.

Text
Q-00206424
View explanation
Q356

Which of the following compounds does not undergo addition reaction?

Single Answer MCQ
Q-00206479
View explanation
Q357

Assertion (A): There are large number of compounds with many carbon atoms linked to each other. Reason (R): Carbon-Carbon bond is very strong and stable.

Single Answer MCQ
Q-00206485
View explanation
Q358

What is homologous series? Which two of the following organic compounds belong to the same homologous series: C2H4, C4H10, C3H4, C4H8?

Text
Q-00206497
View explanation
Q359

Write the product(s): CH3–CH2–OH + CH3COOH → in presence of acid.

Text
Q-00206499
View explanation
Q360

Write the product(s): C2H5OH + O2 → on burning.

Text
Q-00206500
View explanation
Q361

Why does micelle formation take place when soap is added to water?

Text
Q-00206501
View explanation
Q362

Name the compound: CH3–CO–CH3.

Text
Q-00206502
View explanation
Q363

Name the compound: CH3–C≡CH.

Text
Q-00206503
View explanation
Q364

Name the reaction which is commonly used in the conversion of vegetable oils to fats.

Text
Q-00206504
View explanation
Q365

Why is the melting point of C4H10 higher than C3H8?

Text
Q-00206505
View explanation
Q366

What happens when a piece of sodium is dropped into ethanol?

Text
Q-00206506
View explanation
Q367

Write the products in the reaction: CH3COOC2H5 + NaOH →

Text
Q-00206507
View explanation
Q368

When ethanoic acid is treated with sodium hydrogen carbonate, the gas evolved is:

Single Answer MCQ
Q-00206561
View explanation
Q369

The second member of alkyne homologous series is:

Single Answer MCQ
Q-00206562
View explanation
Q370

Define catenation. Why does carbon show catenation?

Text
Q-00206579
View explanation
Q371

Define homologous series. Give examples of two homologues whose molecular mass differ by 14 amu.

Text
Q-00206580
View explanation
Q372

Why do soaps not work well in hard water?

Text
Q-00206581
View explanation
Q373

Why do covalent compounds have low melting and boiling points?

Text
Q-00206582
View explanation
Q374

Why is ethanoic acid a weaker acid than mineral acids?

Text
Q-00206583
View explanation
Q375

Name the reagent that can convert ethanol to ethanoic acid.

Text
Q-00206585
View explanation
Q376

Define esterification reaction.

Text
Q-00206584
View explanation
Q377

What are ‘Micelles’?

Text
Q-00206586
View explanation
Q378

While washing dirty clothes by soap, micelles are formed. Select the correct statement about micelles.

Single Answer MCQ
Q-00206637
View explanation
Q379

Assertion (A): Pure ethanoic acid is also known as glacial acetic acid. Reason (R): Pure ethanoic acid often freezes during winter due to its low melting point of 290 K.

Single Answer MCQ
Q-00206639
View explanation
Q380

Carbon cannot form C4+ cation and C4– anion. Explain.

Text
Q-00206655
View explanation
Q381

Define homologous series of carbon compounds. Why are the melting and boiling points of C4H10 higher than C3H8 or C2H6?

Text
Q-00206658
View explanation
Q382

What happens when ethanol is heated with acidified potassium dichromate?

Text
Q-00206657
View explanation
Q383

When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a sweet-smelling substance is produced. State the class of compounds and write the chemical equation.

Text
Q-00206659
View explanation
Q384

Why do soaps not produce foam with hard water?

Text
Q-00206660
View explanation
Q385

How would you name: I. CH3–CH2–CHO II. CH3–C≡CH

Text
Q-00206661
View explanation
Q386

While washing dirty clothes by soap, micelles are formed. Select the correct statement about micelles.

Single Answer MCQ
Q-00206715
View explanation
Q387

Assertion (A): Pure ethanoic acid is also known as glacial acetic acid. Reason (R): Pure ethanoic acid often freezes during winter due to its low melting point of 290 K.

Single Answer MCQ
Q-00206721
View explanation
Q388

Carbon cannot form C4+ cation and C4− anion. Explain.

Text
Q-00206738
View explanation
Q389

Define homologous series of carbon compounds. Why are the melting and boiling points of C4H10 higher than C3H8 or C2H6?

Text
Q-00206739
View explanation
Q390

What happens when ethanol is heated with acidified potassium dichromate?

Text
Q-00206741
View explanation
Q391

How would you name the following compound: CH3–CH2–CHO?

Text
Q-00206740
View explanation
Q392

How would you name the following compound: CH3–C≡CH?

Text
Q-00206742
View explanation
Q393

When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with sweet smell is produced. State the class of compounds to which the sweet smelling compounds belong.

Text
Q-00206743
View explanation
Q394

When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, write the chemical equation for the reaction.

Text
Q-00206744
View explanation
Q395

Why soaps do not produce foam with hard water?

Text
Q-00206746
View explanation
Q396

While washing dirty clothes by soap, micelles are formed. Select the correct statement about micelles.

Single Answer MCQ
Q-00206799
View explanation
Q397

Assertion (A): Pure ethanoic acid is also known as glacial acetic acid. Reason (R): Pure ethanoic acid often freezes during winter due to its low melting point of 290 K.

Single Answer MCQ
Q-00206804
View explanation
Q398

Define homologous series of carbon compounds. Why are the melting and boiling points of C4H10 higher than C3H8 or C2H6?

Text
Q-00206822
View explanation
Q399

What happens when ethanol is heated with acidified potassium dichromate?

Text
Q-00206823
View explanation
Q400

How would you name CH3–CH2–CHO?

Text
Q-00206824
View explanation
Q401

Carbon cannot form C4+ cation and C4– anion. Explain.

Text
Q-00206825
View explanation
Q402

How would you name CH3–C≡CH?

Text
Q-00206826
View explanation
Q403

When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with sweet smell is produced. State the class of compounds to which the sweet smelling compounds belong.

Text
Q-00206827
View explanation
Q404

Why soaps do not produce foam with hard water?

Text
Q-00206828
View explanation
Q405

When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with sweet smell is produced. Write the chemical equation for the reaction.

Text
Q-00206830
View explanation
Q406

Which of the following set of compounds does not belong to same homologous series?

Single Answer MCQ
Q-00206873
View explanation
Q407

Which of the following will not undergo addition reaction?

Single Answer MCQ
Q-00206877
View explanation
Q408

Alcohol forms a homologous series with general formula CnH2n + 1–OH and –OH group as functional group. Ethanol is commonly called alcohol and is used in alcoholic drinks. It is good solvent, used in medicines, cough syrups, tonics etc. Write structural formula and name of 4th member of alcohol homologous series.

Text
Q-00206887
View explanation
Q409

What happens when ethanol is heated with alkaline KMnO4? Write chemical equation involved.

Text
Q-00206889
View explanation
Q410

Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated H2SO4. Write the name of this reaction.

Text
Q-00206890
View explanation
Q411

What happens when ethanol is heated with excess concentrated sulphuric acid at 443 K? Write chemical equation involved. What is the role of concentrated sulphuric acid in this reaction?

Text
Q-00206891
View explanation
Q412

Which of the following compounds will undergo addition reaction?

Single Answer MCQ
Q-00206937
View explanation
Q413

Assertion (A): There are large number of compounds with many carbon atoms linked to each other. Reason (R): Carbon-Carbon bond is very strong and stable.

Single Answer MCQ
Q-00206941
View explanation
Q414

(i) What is homologous series? Which two compounds among C2H4, C4H10, C3H4, C4H8 belong to the same homologous series? (ii) Write the products in: CH3-CH2-OH + CH3COOH in acid; C2H5OH + O2 on burning. (iii) Why does micelle formation take place when soap is added to water?

Text
Q-00206950
View explanation
Q415

(i) Name the given compounds. (ii) Name the reaction commonly used in conversion of vegetable oils to fats. (iii) Why is the melting point of C4H10 higher than C3H8? (iv) What happens when sodium is dropped into ethanol? (v) Write the products: CH3COOC2H5 + NaOH ->

Text
Q-00206952
View explanation
Q416

Which of the following set of compounds does not belong to same homologous series?

Single Answer MCQ
Q-00207008
View explanation
Q417

Which of the following will not undergo addition reaction?

Single Answer MCQ
Q-00207012
View explanation
Q418

Write structural formula and name of 4th member of alcohol homologous series.

Text
Q-00207026
View explanation
Q419

What happens when ethanol is heated with alkaline KMnO4? Write chemical equation involved.

Text
Q-00207027
View explanation
Q420

Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated H2SO4. Write the name of this reaction.

Text
Q-00207028
View explanation
Q421

What happens when ethanol is heated with excess concentrated sulphuric acid at 443 K? Write chemical equation involved. What is the role of concentrated sulphuric acid in this reaction?

Text
Q-00207031
View explanation
Q422

Which of the following will not undergo addition reaction ?

Single Answer MCQ
Q-00207100
View explanation
Q423

Which of the following set of compounds does not belong to same homologous series ?

Single Answer MCQ
Q-00207101
View explanation
Q424

Write structural formula and name of 4th member of alcohol homologous series.

Text
Q-00207115
View explanation
Q425

What happens when ethanol is heated with alkaline KMnO4 ? Write chemical equation involved.

Text
Q-00207116
View explanation
Q426

Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated H2SO4. Write the name of this reaction.

Text
Q-00207118
View explanation
Q427

What happens when ethanol is heated with excess concentrated sulphuric acid at 443 K ? Write chemical equation involved. What is the role of concentrated sulphuric acid ?

Text
Q-00207119
View explanation
Q428

A hydrocarbon which is different from the other three is:

Single Answer MCQ
Q-00209007
View explanation

Carbon and its Compounds Practice Worksheets

Download and practice Carbon and its Compounds worksheets to improve problem-solving accuracy and speed for CBSE Class 10 Science exams.

Carbon and its Compounds - Practice Worksheet

This worksheet covers essential long-answer questions to help you build confidence in Carbon and its Compounds from Science for Class X (Science).

Practice

Questions

1

Explain the formation of a covalent bond with the example of methane (CH4).

A covalent bond is formed by the sharing of electrons between two atoms to achieve a stable electronic configuration. In methane (CH4), carbon has four valence electrons and needs four more to complete its octet. Hydrogen has one valence electron and needs one more to achieve a duplet. Carbon shares one electron with each of the four hydrogen atoms, resulting in four single covalent bonds. This sharing allows both carbon and hydrogen to achieve stability. Methane is a saturated hydrocarbon with a tetrahedral structure. The bond angle in methane is 109.5 degrees. Covalent bonds are strong and result in low melting and boiling points for covalent compounds. Methane is a colorless, odorless gas used as a fuel. It is the main component of natural gas and biogas. The formation of methane demonstrates the tetravalency of carbon and its ability to form stable compounds through covalent bonding.

2

What are saturated and unsaturated hydrocarbons? Give examples and explain their differences.

Saturated hydrocarbons are compounds where carbon atoms are connected by single bonds and have the maximum number of hydrogen atoms. Examples include methane (CH4) and ethane (C2H6). Unsaturated hydrocarbons have double or triple bonds between carbon atoms and fewer hydrogen atoms. Examples include ethene (C2H4) with a double bond and ethyne (C2H2) with a triple bond. Saturated hydrocarbons are less reactive due to the presence of single bonds, while unsaturated hydrocarbons are more reactive because of the presence of double or triple bonds. Saturated hydrocarbons undergo substitution reactions, whereas unsaturated hydrocarbons undergo addition reactions. The general formula for saturated hydrocarbons (alkanes) is CnH2n+2, for alkenes (with one double bond) is CnH2n, and for alkynes (with one triple bond) is CnH2n-2. Saturated hydrocarbons are found in natural gas and petroleum, while unsaturated hydrocarbons are used in making plastics and synthetic fibers.

3

Describe the process of combustion of carbon compounds with examples.

Combustion is a chemical reaction where a substance reacts with oxygen to produce heat and light. Carbon compounds undergo combustion to form carbon dioxide and water. For example, methane (CH4) burns in oxygen to produce CO2 and H2O: CH4 + 2O2 → CO2 + 2H2O + heat and light. Incomplete combustion occurs when there is insufficient oxygen, producing carbon monoxide (CO) and soot (C). For example: 2CH4 + 3O2 → 2CO + 4H2O. Combustion of hydrocarbons is an exothermic reaction, releasing energy used as fuel. The amount of oxygen available determines the products of combustion. Saturated hydrocarbons burn with a clean blue flame, while unsaturated hydrocarbons burn with a yellow, sooty flame due to incomplete combustion. Combustion is used in engines, stoves, and power plants. It is a major source of energy but also contributes to air pollution.

4

Explain the properties and uses of ethanol.

Ethanol (C2H5OH) is a colorless liquid with a pleasant smell and burning taste. It is soluble in water and forms hydrogen bonds. Ethanol is used as a solvent in medicines, perfumes, and tinctures. It is the active ingredient in alcoholic beverages. Ethanol reacts with sodium to form sodium ethoxide and hydrogen gas: 2C2H5OH + 2Na → 2C2H5ONa + H2. It undergoes dehydration with concentrated sulfuric acid to form ethene: C2H5OH → C2H4 + H2O at 443K. Ethanol burns with a clean blue flame to produce CO2 and H2O: C2H5OH + 3O2 → 2CO2 + 3H2O + heat. It is used as a fuel in some countries, blended with petrol. Ethanol is also used in hand sanitizers due to its antiseptic properties. Excessive consumption of ethanol leads to health issues like liver damage and addiction. Denatured alcohol is ethanol mixed with methanol to prevent misuse.

5

What are the properties and uses of ethanoic acid?

Ethanoic acid (CH3COOH), also known as acetic acid, is a colorless liquid with a pungent smell. It is a weak carboxylic acid and turns blue litmus red. It freezes at 290K, forming glacial acetic acid. Ethanoic acid reacts with bases to form salts: CH3COOH + NaOH → CH3COONa + H2O. It reacts with carbonates and hydrogencarbonates to produce CO2: 2CH3COOH + Na2CO3 → 2CH3COONa + H2O + CO2. Ethanoic acid undergoes esterification with alcohols to form esters: CH3COOH + C2H5OH → CH3COOC2H5 + H2O. Esters are used in perfumes and flavorings. A 5-8% solution of ethanoic acid in water is called vinegar, used as a preservative and condiment. Ethanoic acid is used in the production of cellulose acetate and synthetic fibers. It is also used in the manufacture of dyes and pharmaceuticals.

6

Explain the formation and uses of soaps and detergents.

Soaps are sodium or potassium salts of long-chain fatty acids. They are formed by the saponification of fats or oils with NaOH or KOH: Fat + NaOH → Glycerol + Soap. Soaps have a hydrophilic (water-loving) head and a hydrophobic (water-repelling) tail. In water, soap molecules form micelles, trapping oily dirt in the center. The ionic ends of soap interact with water, while the carbon chains interact with oil. Soaps are less effective in hard water due to the formation of insoluble scum (calcium or magnesium salts). Detergents are ammonium or sulfonate salts of long-chain hydrocarbons. They do not form scum in hard water and are more effective cleaners. Detergents are used in shampoos and laundry products. Soaps are biodegradable, while some detergents can cause water pollution. Both soaps and detergents lower the surface tension of water, aiding in cleaning.

7

What is catenation? How does it contribute to the diversity of carbon compounds?

Catenation is the ability of carbon atoms to form long chains or rings by bonding with other carbon atoms. This property is due to the strong carbon-carbon covalent bonds. Carbon can form single, double, or triple bonds with other carbon atoms, leading to a variety of structures like straight chains, branched chains, and rings. Catenation allows carbon to form a vast number of compounds, including alkanes, alkenes, alkynes, and aromatic compounds. The ability to form isomers (compounds with the same molecular formula but different structures) further increases diversity. Carbon's tetravalency enables it to bond with other elements like hydrogen, oxygen, nitrogen, and halogens, forming functional groups. These functional groups impart specific properties to carbon compounds. Catenation and tetravalency make carbon the backbone of organic chemistry, leading to millions of known compounds.

8

Describe the process of hydrogenation of oils with an example.

Hydrogenation is the addition of hydrogen to unsaturated hydrocarbons in the presence of a catalyst like nickel or palladium. For example, vegetable oils (unsaturated fats) are hydrogenated to form vanaspati ghee (saturated fats): C2H4 + H2 → C2H6 (in the presence of Ni). The double bonds in unsaturated fats are converted to single bonds, making the fats more solid and stable. Hydrogenation increases the melting point of oils, making them suitable for cooking and baking. However, partially hydrogenated oils contain trans fats, which are harmful to health. Hydrogenation is used in the food industry to produce margarine and shortenings. The process is also used to convert alkenes to alkanes in petroleum refining. Hydrogenation improves the shelf life of oils but reduces their nutritional value.

9

Explain the difference between alkanes, alkenes, and alkynes with examples.

Alkanes are saturated hydrocarbons with single bonds between carbon atoms. Their general formula is CnH2n+2. Examples include methane (CH4) and ethane (C2H6). Alkenes are unsaturated hydrocarbons with at least one double bond. Their general formula is CnH2n. Examples include ethene (C2H4) and propene (C3H6). Alkynes are unsaturated hydrocarbons with at least one triple bond. Their general formula is CnH2n-2. Examples include ethyne (C2H2) and propyne (C3H4). Alkanes are less reactive and undergo substitution reactions. Alkenes and alkynes are more reactive and undergo addition reactions. Alkanes burn with a clean blue flame, while alkenes and alkynes burn with a sooty flame. Alkenes and alkynes are used in the production of plastics, synthetic fibers, and chemicals. Alkanes are used as fuels and solvents.

10

What are functional groups? Give examples and explain their importance.

Functional groups are specific groups of atoms within molecules that determine the chemical properties of those molecules. Examples include hydroxyl (-OH) in alcohols, carboxyl (-COOH) in carboxylic acids, and aldehyde (-CHO) in aldehydes. Functional groups are responsible for the characteristic reactions of organic compounds. For example, alcohols undergo esterification and oxidation, while carboxylic acids react with bases and alcohols. The presence of a functional group can change the physical properties like boiling point and solubility. Functional groups help classify organic compounds into families like alcohols, aldehydes, ketones, and acids. They are crucial in the synthesis of pharmaceuticals, dyes, and polymers. Understanding functional groups allows chemists to predict the behavior of organic compounds and design new molecules for specific applications.

Carbon and its Compounds - Mastery Worksheet

This worksheet challenges you with deeper, multi-concept long-answer questions from Carbon and its Compounds to prepare for higher-weightage questions in Class X Science.

Mastery

Questions

1

Explain the concept of catenation and tetravalency in carbon with examples.

Catenation is the ability of carbon to form bonds with other carbon atoms, leading to long chains, branched chains, or rings. Tetravalency refers to carbon's ability to form four covalent bonds due to its four valence electrons. Examples include methane (CH4) where carbon forms four single bonds with hydrogen, and ethane (C2H6) where two carbon atoms are bonded together with single bonds.

2

Compare and contrast saturated and unsaturated hydrocarbons with examples.

Saturated hydrocarbons have single bonds between carbon atoms and are less reactive (e.g., methane, CH4). Unsaturated hydrocarbons have double or triple bonds and are more reactive (e.g., ethene, C2H4, with a double bond). A table can be used to compare their properties, reactivity, and examples.

3

Describe the formation of a covalent bond in a molecule of methane (CH4) with an electron dot structure.

In methane, carbon shares its four valence electrons with four hydrogen atoms, each contributing one electron, forming four single covalent bonds. The electron dot structure shows carbon at the center with four hydrogen atoms around it, each connected by a pair of shared electrons.

4

Explain the process of hydrogenation and its industrial application.

Hydrogenation is the addition of hydrogen to unsaturated hydrocarbons in the presence of a catalyst like nickel or palladium, converting them into saturated hydrocarbons. Industrially, it's used to convert vegetable oils into vanaspati ghee by adding hydrogen to the double bonds in the oil molecules.

5

How does the presence of a functional group affect the properties of carbon compounds? Give examples.

Functional groups determine the chemical properties of carbon compounds. For example, alcohols (-OH group) are polar and can form hydrogen bonds, making them soluble in water (e.g., ethanol). Carboxylic acids (-COOH group) are acidic and can donate protons (e.g., acetic acid).

6

Discuss the mechanism of the cleaning action of soaps with a diagram of micelle formation.

Soap molecules have a hydrophilic (water-attracting) head and a hydrophobic (oil-attracting) tail. In water, they form micelles where the tails trap oil droplets, and the heads face outward, allowing the oil to be washed away. A diagram would show the micelle structure with oil in the center surrounded by soap molecules.

7

Why are carbon and its compounds used as fuels for most applications?

Carbon compounds release a large amount of energy upon combustion, making them efficient fuels. They are abundant and can be stored and transported easily. Examples include methane (natural gas) and petrol, which are used for heating and in vehicles.

8

Differentiate between ethanol and ethanoic acid on the basis of their physical and chemical properties.

Ethanol is a liquid at room temperature with a pleasant smell and is used in alcoholic drinks. Ethanoic acid is a colorless liquid with a pungent smell and is the main component of vinegar. Chemically, ethanol can be oxidized to ethanoic acid, and ethanoic acid reacts with carbonates to release CO2.

9

Explain the formation of scum when hard water is treated with soap.

Hard water contains calcium and magnesium ions that react with soap to form insoluble precipitates called scum. This happens because the ions displace sodium or potassium in the soap, forming calcium or magnesium salts that are insoluble in water.

10

What are structural isomers? Draw the structures of two isomers of butane (C4H10).

Structural isomers are compounds with the same molecular formula but different structures. For butane (C4H10), the two isomers are n-butane (a straight chain) and isobutane (a branched chain). Their structures can be drawn showing the arrangement of carbon atoms and hydrogen atoms.

Carbon and its Compounds - Challenge Worksheet

The final worksheet presents challenging long-answer questions that test your depth of understanding and exam-readiness for Carbon and its Compounds in Class X.

Challenge

Questions

1

Evaluate the implications of catenation in the diversity of carbon compounds.

Catenation allows carbon to form long chains, branched chains, and rings, leading to a vast diversity of compounds. This property, combined with carbon's tetravalency, enables the formation of millions of organic compounds. Examples include linear alkanes like methane (CH4) and complex molecules like DNA. Counterpoints could involve comparing carbon's catenation with other elements like silicon, which forms fewer stable chains.

2

Explain why carbon forms covalent bonds rather than ionic bonds in its compounds.

Carbon has four valence electrons, making it difficult to gain or lose four electrons to form ions. Sharing electrons through covalent bonding is energetically favorable. For example, methane (CH4) forms four covalent bonds. Ionic bonding would require too much energy to remove four electrons or add four electrons, making it impractical.

3

Analyze the role of functional groups in determining the properties of organic compounds.

Functional groups like -OH (alcohol), -COOH (carboxylic acid), and -CHO (aldehyde) impart specific chemical properties to organic compounds. For instance, alcohols are polar and can form hydrogen bonds, making them soluble in water. Carboxylic acids are acidic due to the -COOH group. The presence of different functional groups leads to varied reactivity and physical properties.

4

Compare the combustion of saturated and unsaturated hydrocarbons.

Saturated hydrocarbons (alkanes) burn with a clean blue flame, producing CO2 and H2O. Unsaturated hydrocarbons (alkenes and alkynes) burn with a sooty yellow flame due to incomplete combustion, resulting in carbon particles. For example, methane (CH4) burns cleanly, while ethene (C2H4) produces soot. The difference arises from the higher carbon content and double/triple bonds in unsaturated hydrocarbons.

5

Discuss the significance of homologous series in organic chemistry.

Homologous series are families of compounds with the same functional group and general formula, differing by a -CH2- unit. They exhibit gradation in physical properties and similar chemical properties. For example, the alcohols methanol (CH3OH), ethanol (C2H5OH), and propanol (C3H7OH) show increasing boiling points but similar reactions. This systematic variation aids in predicting properties and reactions of unknown members.

6

Explain the mechanism of soap action in cleaning.

Soap molecules have a hydrophilic (water-attracting) head and a hydrophobic (oil-attracting) tail. In water, they form micelles, with tails trapping oily dirt and heads facing outward, emulsifying the dirt. The micelles are washed away with water. For example, stearate ions in soap form micelles around grease. However, soaps are ineffective in hard water due to scum formation with Ca2+ and Mg2+ ions.

7

Evaluate the environmental impact of burning fossil fuels.

Burning fossil fuels releases CO2, a greenhouse gas, contributing to global warming. It also produces SO2 and NOx, causing acid rain. For example, coal combustion releases sulfur oxides. Counterpoints include the economic necessity of fossil fuels for energy. Alternatives like biofuels and renewable energy can mitigate these impacts.

8

Describe the process of hydrogenation and its industrial applications.

Hydrogenation involves adding hydrogen to unsaturated hydrocarbons in the presence of a catalyst (e.g., Ni or Pd). It converts alkenes to alkanes and vegetable oils to solid fats (margarine). For example, ethene (C2H4) becomes ethane (C2H6). This process is crucial in food and chemical industries for producing saturated fats and other products.

9

Analyze the differences between soaps and detergents.

Soaps are sodium/potassium salts of fatty acids, effective in soft water but form scum in hard water. Detergents are sulfonates or ammonium salts, effective in both soft and hard water. For example, sodium stearate (soap) vs. sodium lauryl sulfate (detergent). Detergents are more versatile but can be non-biodegradable, causing environmental issues.

10

Explain the formation and properties of ethanol and ethanoic acid.

Ethanol (CH3CH2OH) is formed by fermentation of sugars, while ethanoic acid (CH3COOH) is produced by oxidation of ethanol. Ethanol is a solvent and fuel, whereas ethanoic acid is a weak acid used in vinegar. For example, ethanol reacts with Na to form H2, while ethanoic acid reacts with carbonates to release CO2. Their functional groups (-OH and -COOH) dictate their properties.

Carbon and its Compounds Formula Sheet

Use this Class 10 Science Carbon and its Compounds Formula Sheet for quick revision before school exams and CBSE exams. It brings together the important formulas, key concepts, and worked examples in one place so students can revise faster and download a printable PDF for offline study.

Important Formulas

1

CₙH₂ₙ₊₂ (Alkane)

General formula for alkanes, where n is the number of carbon atoms. Alkanes are saturated hydrocarbons with single bonds. Example: Methane (CH₄).

2

CₙH₂ₙ (Alkene)

General formula for alkenes, indicating unsaturated hydrocarbons with at least one double bond. Example: Ethene (C₂H₄).

3

CₙH₂ₙ₋₂ (Alkyne)

General formula for alkynes, denoting unsaturated hydrocarbons with at least one triple bond. Example: Ethyne (C₂H₂).

4

CₙH₂ₙ₊₁OH (Alcohol)

General formula for alcohols, where n is the number of carbon atoms. Example: Ethanol (C₂H₅OH).

5

CₙH₂ₙ₊₁COOH (Carboxylic Acid)

General formula for carboxylic acids. Example: Ethanoic acid (CH₃COOH).

6

CₙH₂ₙ₊₁COOCₘH₂ₘ₊₁ (Ester)

General formula for esters, formed by the reaction of alcohols and carboxylic acids. Example: Ethyl ethanoate (CH₃COOC₂H₅).

7

C₆H₁₂O₆ (Glucose)

Molecular formula of glucose, a simple sugar and a key energy source in living organisms.

8

CH₄ (Methane)

Simplest alkane and a major component of natural gas. Used as a fuel.

9

C₂H₅OH (Ethanol)

Ethanol, used in alcoholic beverages and as a solvent. Can be produced by fermentation.

10

CH₃COOH (Ethanoic Acid)

Ethanoic acid, commonly known as acetic acid, used in vinegar and as a preservative.

Worked Examples

1

Combustion of Methane: CH₄ + 2O₂ → CO₂ + 2H₂O

Methane burns in oxygen to produce carbon dioxide and water, releasing energy. Demonstrates complete combustion.

2

Fermentation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

Glucose is converted into ethanol and carbon dioxide by yeast in the absence of oxygen.

3

Esterification: CH₃COOH + C₂H₅OH → CH₃COOC₂H₅ + H₂O

Ethanoic acid reacts with ethanol in the presence of an acid catalyst to form ethyl ethanoate (ester) and water.

4

Oxidation of Ethanol: C₂H₅OH + [O] → CH₃COOH + H₂O

Ethanol is oxidized to ethanoic acid using oxidizing agents like alkaline KMnO₄ or K₂Cr₂O₇.

5

Hydrogenation of Ethene: C₂H₄ + H₂ → C₂H₆

Ethene reacts with hydrogen in the presence of a nickel catalyst to form ethane, a saturated hydrocarbon.

6

Substitution Reaction: CH₄ + Cl₂ → CH₃Cl + HCl

In the presence of sunlight, methane reacts with chlorine to form chloromethane and hydrogen chloride.

7

Dehydration of Ethanol: C₂H₅OH → C₂H₄ + H₂O

Ethanol is dehydrated to ethene in the presence of concentrated sulphuric acid at 443 K.

8

Saponification: CH₃COOC₂H₅ + NaOH → CH₃COONa + C₂H₅OH

Ester reacts with sodium hydroxide to form sodium acetate and ethanol, a process used in soap making.

9

Reaction with Sodium: 2C₂H₅OH + 2Na → 2C₂H₅ONa + H₂

Ethanol reacts with sodium to form sodium ethoxide and hydrogen gas, indicating the acidic nature of alcohols.

10

Neutralization: CH₃COOH + NaOH → CH₃COONa + H₂O

Ethanoic acid reacts with sodium hydroxide to form sodium acetate and water, a typical acid-base reaction.

Explore More Carbon and its Compounds Resources

Explore more chapter resources to strengthen your understanding and prepare for exams.

Carbon and its Compounds Frequently Asked Questions

Explore the significance of carbon compounds, their properties, and applications in real life. This chapter covers bonding, types of carbon compounds, and practical uses in daily life.

Covalent bonding in carbon compounds is characterized by the sharing of valence electrons between carbon and other atoms. This allows both carbon and the other atoms to achieve a stable configuration similar to that of noble gases. Carbon's tetravalency enables it to form four bonds, leading to diverse structures.
The two key properties of carbon that contribute to its wide variety of compounds are catenation, the ability to form chains and rings with other carbon atoms, and tetravalency, where it can bond with four other atoms, fostering diverse molecular structures.
Saturated carbon compounds contain only single bonds between carbon atoms, exemplified by alkanes, while unsaturated compounds possess one or more double or triple bonds, such as alkenes and alkynes, making them more reactive due to the presence of these multiple bonds.
Functional groups are specific groups of atoms within molecules that determine the chemical properties and reactions of those molecules. They influence reactivity, solubility, and acidity, playing a critical role in defining the behavior of organic compounds.
Ethanol exhibits significant chemical properties such as being a good solvent, reacting with sodium to produce hydrogen gas, and acting as a reactant in dehydration reactions. It can also be oxidized to form ethanoic acid, demonstrating its versatile chemistry.
Ethanoic acid, often referred to as acetic acid, is primarily used in culinary applications as vinegar, which serves both as a condiment and a preservative. Its properties make it useful in food preservation, as well as in various chemical reactions in laboratories.
The combustion of carbon compounds can produce carbon dioxide, leading to greenhouse gas emissions, and can release pollutants like oxides of sulfur and nitrogen, contributing to air pollution and environmental issues such as acid rain and smog.
Carbon is a fundamental element in all living organisms, forming the backbone of organic molecules such as carbohydrates, proteins, lipids, and nucleic acids. It is essential for biological processes, enabling the complexity and diversity of life.
Structural isomers are compounds that share the same molecular formula but differ in the arrangement of their atoms. This can result in different physical and chemical properties despite having the same composition, highlighting the diversity of carbon chemistry.
Saponification is the chemical reaction between a fat or oil and an alkali, resulting in the formation of soap and glycerol. This process showcases the significance of esters and how they can revert to their constituent alcohols and carboxylic acids.
The octet rule states that atoms tend to form bonds in a way that provides them with eight electrons in their valence shell, leading to stability. For carbon, this is achieved through covalent bonding with other atoms, facilitating the formation of various organic compounds.
Soaps and detergents work by forming micelles, wherein the hydrophobic tails of the molecules encapsulate oil and dirt, while the hydrophilic heads remain in water. This mechanism allows for the removal of oily substances from surfaces.
Soaps are typically made from natural fats and oils and can form insoluble precipitates with calcium and magnesium ions in hard water. Detergents, on the other hand, are synthetic compounds that do not form scum and work effectively in hard water.
When handling ethanol, it is important to avoid ingestion and minimize exposure to skin and eyes. Use it in well-ventilated areas away from heat sources, as it is flammable, and always follow safety data sheets for handling chemical substances.
Carbon is termed a versatile element because of its ability to form stable covalent bonds with a wide variety of other elements, including itself. This leads to an extensive range of compounds, making it pivotal in organic chemistry and life.
Incomplete combustion of carbon compounds typically results in the production of carbon monoxide (a toxic gas) and soot, both of which are harmful to health and the environment, contrasting with complete combustion which produces carbon dioxide and water.
Potassium permanganate acts as an oxidizing agent in chemical reactions, particularly in organic chemistry, where it facilitates the oxidation of alcohols to carboxylic acids. Its distinct color change upon reduction also serves as a visual confirmation of the reaction.
Carbon can exist in several structural forms, known as allotropes, including diamond, graphite, and fullerenes, each exhibiting unique physical properties due to differing bonding and arrangement of carbon atoms.
Carbon's small atomic size allows it to form strong covalent bonds with other atoms. This attribute contributes to the stability of carbon compounds and makes them essential in creating a variety of organic matter.
Alcohols, like ethanol, can be distinguished from carboxylic acids, like ethanoic acid, using litmus tests or through specific reactions with sodium or potassium permanganate, as acids will typically exhibit stronger acidic behavior.

Carbon and its Compounds PDF Downloads

Download worksheets, revision guides, formula sheets, and the official textbook PDF for Carbon and its Compounds.

Carbon and its Compounds Official Textbook PDF

Download the official NCERT/CBSE textbook PDF for Class 10 Science.

Official PDFEnglish EditionNCERT Source

Carbon and its Compounds Revision Guide

Use this one-page guide to revise the most important ideas from Carbon and its Compounds.

Best for1-page chapter recap

Carbon and its Compounds Formula Sheet

Download the Carbon and its Compounds formula sheet PDF with important formulas, worked examples, and quick revision support for exam preparation.

Best forImportant formulas for quick revision

Carbon and its Compounds Practice Worksheet

Solve basic and application-based questions from Carbon and its Compounds.

Best forCore practice set

Carbon and its Compounds Mastery Worksheet

Work through mixed Carbon and its Compounds questions to improve accuracy and speed.

Best forMixed difficulty set

Carbon and its Compounds Challenge Worksheet

Try harder Carbon and its Compounds questions that test deeper understanding.

Best forFor deeper problem solving

Carbon and its Compounds Question Bank

Download important questions and exam-style prompts from Carbon and its Compounds.

Best forPrintable question set

Carbon and its Compounds Flashcards

Revise key terms and definitions from Carbon and its Compounds with interactive flashcards. Quick recall practice for CBSE Class 10 Science.

These flash cards cover important concepts from Carbon and its Compounds in Science for Class 10 (Science).

1/20

What is the atomic number of Carbon?

1/20

The atomic number of Carbon is 6.

How well did you know this?

Not at allPerfectly

2/20

Define catenation.

2/20

Catenation is the ability of carbon to form long chains or rings by bonding with other carbon atoms.

How well did you know this?

Not at allPerfectly
Active

3/20

What is the formula of Methane?

Active

3/20

The formula of Methane is CH4.

How well did you know this?

Not at allPerfectly

4/20

What type of bond is formed between two carbon atoms in Alkanes?

4/20

A single covalent bond is formed between two carbon atoms in Alkanes.

5/20

Difference between saturated and unsaturated compounds?

5/20

Saturated compounds have only single bonds, while unsaturated compounds have one or more double or triple bonds.

6/20

What is the formula for Ethylene?

6/20

The formula for Ethylene (Ethene) is C2H4.

7/20

Describe the structure of Graphite.

7/20

In Graphite, each carbon atom is bonded to three others in a plane, forming hexagonal arrays with layers.

8/20

What is the combustion reaction for Methane?

8/20

The combustion of Methane: CH4 + 2O2 → CO2 + 2H2O + heat.

9/20

What kind of compounds are Alkenes?

9/20

Alkenes are unsaturated hydrocarbons that contain at least one double bond.

10/20

What is the main product of burning carbon-containing compounds?

10/20

The main product is carbon dioxide (CO2) along with heat and light.

11/20

Explain the concept of structural isomers.

11/20

Structural isomers are compounds that have the same molecular formula but different structural arrangements.

12/20

What is a functional group?

12/20

A functional group is a specific group of atoms within a molecule that determines its chemical properties.

13/20

What is the general formula for Alkanes?

13/20

The general formula for Alkanes is CnH2n+2.

14/20

Define Oxidation in organic chemistry.

14/20

Oxidation is the process of adding oxygen or removing hydrogen from a compound.

15/20

What is the product of complete combustion of hydrocarbons?

15/20

The complete combustion of hydrocarbons produces carbon dioxide and water.

16/20

How does Carbon's small size affect its bonding?

16/20

Carbon's small size allows its nucleus to hold shared electrons strongly, leading to stable bonds.

17/20

What are Homologous Series?

17/20

Homologous series are groups of compounds with the same functional group and similar chemical properties but different molecular sizes.

18/20

What type of bond exists in Ethyne?

18/20

Ethyne (C2H2) has a triple bond between the two carbon atoms.

19/20

What distinguishes diamond structure from other allotropes of Carbon?

19/20

In diamond, each carbon atom is bonded to four other carbon atoms in a 3D structure.

20/20

Identify the test for confirming the presence of Carbon.

20/20

Burning the compound; if CO2 is produced, carbon is present.

View all 20 Carbon and its Compounds flashcards

Practice Carbon and its Compounds with Interactive Duels

Live Academic Duel

Master Carbon and its Compounds via Live Academic Duels

Challenge your classmates or test your individual retention on the core concepts of CBSE Class 10 Science (Science). Compete in speed-recall question rounds matched explicitly to the latest syllabus milestones for Carbon and its Compounds.

CBSE-aligned questions
Instant speed-recall rounds

Quick, competitive practice on Carbon and its Compounds with zero setup.