Most Important Questions

Flash Cards: Metals and Non-metals

This chapter focuses on the classification, properties, and reactivity of metals and non-metals.

Metals and Non-metals - Flash Cards

These flash cards cover important concepts from Metals and Non-metals in Science for Class 10 (Science).

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What is metallic lustre?

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Metallic lustre is the shiny appearance of metals when they are in their pure state.

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2/20

Define malleability.

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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?

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Ductility is the ability of a metal to be drawn into thin wires. Gold is the most ductile metal.

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4/20

What are sonorous metals?

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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.

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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?

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Metals react with acids to produce a salt and hydrogen gas.

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What are amphoteric oxides?

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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?

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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.

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Magnesium burns with a bright white flame to form magnesium oxide.

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What is corrosion?

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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.

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Rusting can be prevented by painting, galvanizing, or applying oil to iron.

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What is an ore?

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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.

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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?

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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?

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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?

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Bromine is the only non-metal that is liquid at room temperature.

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What is the defining characteristic of metals?

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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?

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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.

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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?

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Non-metals can be gases (like oxygen) or solids (like sulfur) and do not have metallic lustre or conductivity.