Chemical Reactions

Question 1

When methane burns in oxygen, carbon dioxide and water are made. Which is a reactant?

Answer 1

Oxygen

Question 2

Copper oxide and carbon dioxide are made when copper carbonate is heated strongly. Which is a product?

Answer 2

Copper oxide

Question 3

What name is given to the force that holds atoms together in a compound?

Answer 3

Chemical bond

Question 4

What is another name for combustion?

Answer 4

combustion

Question 5

Combustion reactions always release energy. What word can be used to describe them?

Answer 5

Endothermic

Question 6

Which of these is found in the fire triangle and is therefore essential for combustion?

Answer 6

Oxygen

Question 7

What is a hydrocarbon?

Answer 7

Hydrocarbons contain hydrogen and carbon only.

Question 8

What is produced when a hydrocarbon fuel burns in a very good supply of oxygen?

Answer 8

Carbon dioxide and water are produced.

Question 9

Which type of combustion releases the most energy?

Answer 9

Complete combustion

Question 10

What name is given to a substance that speeds up a reaction without being used up or chemically changed?

Answer 10

A catalyst speeds up a reaction.