Chemical reactions

Question 1

What are reactants

Answer 1

The substances that react together

Question 2

What are the substances that react together called

Answer 2

Reactants

Question 3

The things formed in the reaction are called the…

Answer 3

Products

Question 4

Products

Answer 4

The things formed in the reaction

Question 5

Atoms are created or destroyed in a chemical reaction - True or False

Answer 5

False - No atoms are created or destroyed in a chemical reaction

Question 6

Reaction for Carbon Dioxide…

Answer 6

C + O2 → CO2

Question 7

Reaction for Water…

Answer 7

2H2 + O2 → 2H2O

Question 8

Reaction for Magnesium Oxide…

Answer 8

2Mg + O2 → 2MgO

Question 9

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

Answer 9

Oxygen and Methane

Question 10

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

Answer 10

Copper oxide and Carbon Dioxide

Question 11

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

Answer 11

Chemical bond

Question 12

What is another name for combustion?

Answer 12

Burning

Question 13

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

Answer 13

Exothermic

Question 14

What is a hydrocarbon?

Answer 14

Hydrocarbons contain hydrogen and carbon only. They must not have any other elements in them.

Question 15

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

Answer 15

Carbon Dioxide + water

Question 16

Which type of combustion releases the most energy?

Answer 16

Complete combustion

Question 17

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

Answer 17

A Catalyst