10.6 Metal displacement reactions

What is the main use of copper?

• Water pipes.

• Electrical equipment.

• Food packaging

• Heat exchangers.

When copper is extracted from copper ore waste,

We spray dilute sulfuric acid onto copper ore waste, this produces a..............................................

• copper sulfite solution.

• hydrogen sulfate solution.

• copper sulfate solution.

• copper metal.

When copper is extracted from copper ore waste,

Add waste iron to the copper sulfate solution, this produces ..............................................

• copper and iron sulfate.

• iron and copper sulfate.

• copper and iron metals.

• copper and iron sulfite.

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

• Solution turns green.

• Magnesium metal forms.

• Copper metal forms.

• No change.

What happens when magnesium is added to copper sulfate solution?

• Solution turns green.

• The blue solution turns red.

• The blue solution becomes paler.

• No change.

What happens when copper is added to magnesium chloride solution?

• Magnesium forms.

• No reaction.

• Copper dissolves.

• Solution turns blue.

When copper is added to magnesium chloride solution, nothing happens why?

• Magnesium is less reactive than copper.

• Copper is less reactive than magnesium.

• Copper do not react at room temperature.

• Magnesium chloride does not react with metals.

What is the product of the thermite reaction between aluminium and iron oxide?

• A. Aluminium oxide

• B. Iron oxide

• D. Aluminium

• C. Iron

What is the product of the thermite reaction between iron and copper oxide ?

• glows red, pink-brown metal formed

• no reaction

• glows red, silver-coloured metal formed

• glows yellow, golden-coloured metal formed

What is the product of the thermite reaction between zinc and copper oxide ?

• glows red, pink-brown metal formed

• no reaction

• glows red, silver-coloured metal formed

• glows yellow, golden-coloured metal formed