Metals and Non-metals - Flash Cards
This chapter focuses on the classification, properties, and reactivity of metals and non-metals.
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What is metallic lustre?
Metallic lustre is the shiny appearance of metals when they are in their pure state.
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Define malleability.
Malleability is the ability of a metal to be beaten into thin sheets. Gold and silver are the most malleable metals.
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What does ductility mean?
Ductility is the ability of a metal to be drawn into thin wires. Gold is the most ductile metal.
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What are sonorous metals?
Sonorous metals are those which produce sound when struck. Examples include copper and brass, which are used in bells.
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List one physical property of non-metals.
Most non-metals are not lustrous and are poor conductors of heat and electricity.
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What happens when a metal reacts with acids?
Metals react with acids to produce a salt and hydrogen gas.
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What are amphoteric oxides?
Amphoteric oxides can react with both acids and bases to form salts and water. Examples: aluminium oxide and zinc oxide.
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What is the reactivity series?
The reactivity series is a list of metals arranged in order of decreasing reactivity, from potassium to gold.
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Explain what occurs when magnesium is burnt in air.
Magnesium burns with a bright white flame to form magnesium oxide.
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What is corrosion?
Corrosion is the process of deterioration of metals due to chemical reactions, often leading to rust in iron.
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Name a method to prevent rusting.
Rusting can be prevented by painting, galvanizing, or applying oil to iron.
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What is an ore?
An ore is a naturally occurring solid material from which a metal can be extracted profitably.
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Describe the conduction property of metals.
Metals are good conductors of heat and electricity due to the presence of free-moving electrons.
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How do metals generally react with water?
Metals react with water to produce a metal hydroxide and hydrogen gas, though this differs by reactivity.
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What do you observe when metals react with dilute hydrochloric acid?
Bubbles of hydrogen gas are produced, indicating a reaction as the metal displaces hydrogen from the acid.
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What is the only liquid non-metal at room temperature?
Bromine is the only non-metal that is liquid at room temperature.
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What is the defining characteristic of metals?
Metals are typically solid at room temperature (except mercury) and exhibit properties like malleability and ductility.
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What is the outcome when sodium reacts with water?
Sodium reacts vigorously with water to produce sodium hydroxide and hydrogen gas.
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Give an example of an exception in metal classification.
Mercury is a metal that is liquid at room temperature, unlike other metals.
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What are non-metals known for in terms of physical properties?
Non-metals can be gases (like oxygen) or solids (like sulfur) and do not have metallic lustre or conductivity.
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Official curated syllabus resources matching the CBSE Class 10 Science curriculum for Science.