Y7 Combustion Reactions

Combustion is the scientific name for (a)  

During combustion, a fuel reacts with (a)   gas from the air.

A fuel is a solid, liquid or gas with a store of (a)   which can be released by burning it.

Which two of these are the products of combustion of a fuel?

• Water vapour

• Oxygen

• Smoke

• Carbon dioxide

• Air

Which of these turns cloudy when exposed to carbon dioxide?

• Blue cobalt chloride paper

• Lime juice

• Limewater

• Ethanol fuel

• Water

All combustion reactions are exothermic, which means they give off (a)   to their surroundings.

Attempting to put out fires yourself can be risky, but which of these might be a suitable way to tackle an electrical or cooking oil fire?

• Cool it down by spraying it with water

• Keep out oxygen, using a fire blanket, sand or foam

• Try to remove the fuel

• None of these is suitable

In the space below, write out a word equation for the combustion of the fuel petrol. Remember to put the reactants on the left-hand side and the products on the right.