40-41: Useful Compounds (Foundation)

Question 1

What is the most common compund?

Answer 1

Water

Question 2

Which compound is commonly used for flavoring or as a preservative?

Answer 2

Salt (Sodium Chloride - NaCl)

Question 3

Name 2 compounds we can make from salt

Answer 3

Hydrochloric Acid or Sodium hydroxide

Question 4

Name 2 uses of Carbon dioxide

Answer 4

The bubbles in fizzy drinks

Fire extinguisher

Question 5

Complete the equation that happens when carbon burns

carbon + oxygen –> ?

Answer 5

Carbon dioxide

Question 6

Name 3 fuels that contain Carbon

Answer 6

Wood
Petrol
Coal
Natural gas

Question 7

When fuels containing carbon burn they make the same gas. What is the name of this gas?

Answer 7

Carbon dioxide

Question 8

Air contains small amounts of ______ dioxide gas

Answer 8

Carbon

Question 9

What is the scientific name for carbon based compound burning in air?

Answer 9

combustion reaction

Question 10

How can we test for carbon dioxide gas?

Answer 10

Bubble the gas through lime water and if it turns cloudy carbon dioxide is present