05 Chemical Reactions 2

What do we use limewater to test for?

• Carbon Dioxide

• Water

• Heat

• Smoke

Why do we burn a fuel?

• To have fun

• To release energy

• To lose energy

• To produce carbon dioxide

What is essential for a combustion reaction to begin?

• Carbon dioxide
• Fuel 
• Fuel, oxygen and heat
• Water and oxygen

What are the products of combustion?

• Hydrogen + oxygen

• Carbon dioxide + water

• Carbon dioxide + hydrogen

• Carbon + water

What does this hazard symbol warn of?

• The substance is explosive

• The substance burns easily

• The substance supplies oxygen to fires

• The substance puts out fires

Why should you not add water on burning oil?

• It makes the fire explode and spread

• It puts the fire out too quickly

• Water does not put out fires

• It takes too long to put out the fire

What does incomplete combustion produce that complete combustion doesn't?

• Carbon Monoxide

• Water

• Heat

• Carbon Dioxide

What are the products of the complete combustion of hydrocarbons? Tick all that apply.

• carbon particulates

• carbon dioxide

• carbon monoxide

• water

What does the "thermal" in thermal decomposition mean?

• sulfur

• catalyst

• heat

• oven

copper(II)carbonate → ___________ + carbon dioxide

• copper(I) oxide

• copper(II) oxide

• copper oxide

• copper(III) oxide