chemistry 8

Which of the following is not an example of fossil fuels

• coal

• petrol

• nuclear

• diesel

Which of the following experiments do we use to test for water?

• cobalt chloride paper

• limewater

• lighted splint goes off with a pop sound

• copper sulphate

Which one of the following experiment do we use to test for carbon dioxide?

• cobalt chloride

• limewater

• the lighted splint goes off with a pop sound

• copper sulphate

Which one of the following experiments do we use to test for hydrogen gas?

• cobalt chloride paper

• limewater

• the lighted splint goes off with a pop sound

• copper sulphate

• hydrogen

• water

• oxygen

What is know as a fuel?

What happens when we add water to anhydrous copper sulphate?

Explain the law of conservation of mass.

4g of zinc metal burns to form 5.6g of zinc oxide.

What is the mass of oxygen that reacts with zinc?

• 4g

• 10g

• 1.6g

• 1.4g

What is an exothermic reaction?