Copper Reactions and Properties

This video explores the reactions of copper with various substances, including air, water, halogens, and acids. It explains the oxidation of copper, forming copper oxide, and its use in measuring oxygen levels. Copper's non-reactivity with water is highlighted, making it suitable for pipes. The video also covers copper's reactions with halogens, forming colorful halides, and its interactions with acids, producing different gases. Finally, copper's role in displacement reactions due to its low reactivity is discussed.

What is the green layer that forms on copper over time due to oxidation?

• Copper sulfate

• Copper nitrate

• Copper chloride

• Basic copper carbonate

How can the reaction of copper with oxygen be used practically?

• To measure the percentage of oxygen in the air

• To create copper sulfate

• To produce hydrogen gas

• To measure the percentage of nitrogen in the air

Why is copper often used for water pipes?

• It does not react with water

• It is cheaper than other metals

• It is highly reactive with water

• It reacts with water to form a protective layer

What is formed when copper reacts with fluorine?

• Copper sulfate

• Copper oxide

• Copper nitrate

• Copper fluoride

Which acid does not react with copper?

• Acetic acid

• Hydrochloric acid

• Nitric acid

• Sulfuric acid

What gas is produced when copper reacts with concentrated nitric acid?

• Oxygen

• Sulfur dioxide

• Hydrogen

• Nitrogen dioxide

What is a potential hazard when copper reacts with concentrated sulfuric acid?

• Production of hydrogen gas

• Production of sulfur dioxide

• Production of nitrogen gas

• Production of carbon dioxide

Why is copper often obtained through displacement reactions?

• Due to its low reactivity

• Due to its high reactivity

• Because it is a noble gas

• Because it is a non-metal

What happens when magnesium is added to a copper sulfate solution?

• No reaction occurs

• Copper sulfate is formed

• Magnesium is displaced

• Copper is displaced

Which metal can displace copper from its salt solution?

• Gold

• Platinum

• Silver

• Iron