Uses Of Metals - Gold, Copper, Aluminium, Steel

The video explores the periodic table's 91 pure metals, focusing on their properties and uses. Unreactive metals like gold, silver, and copper are highlighted for their resistance to air and water, making them ideal for jewelry and piping. Copper's conductivity and malleability are discussed, along with its historical use in water pipes. Aluminum's protective oxide layer and lightweight nature make it suitable for trains and planes. Steel's strength and affordability have revolutionized construction, replacing iron in many applications. The video concludes by summarizing the diverse applications of metals based on their unique properties.

Which of the following metals is known for its low reactivity and is commonly used in jewelry?

• Iron

• Gold

• Aluminum

• Zinc

Why was copper historically used for water pipes?

• It is unreactive with water and malleable.

• It is cheaper than other metals.

• It reacts with water to form a protective layer.

• It is a good conductor of heat.

What property of aluminum makes it suitable for use in the bodies of planes?

• It is highly reactive.

• It is less dense and can form strong alloys.

• It is a poor conductor of electricity.

• It is more expensive than other metals.

How does aluminum protect itself from corrosion?

• By being painted regularly.

• By being stored in a dry environment.

• By forming a layer of aluminum oxide.

• By reacting with water.

What is the main advantage of steel over pure iron in construction?

• Steel is a better conductor of electricity.

• Steel is lighter than iron.

• Steel is more reactive than iron.

• Steel is stronger and cheaper to produce.