Y8 Combustion Formative

Which one of the following is not a fossil fuel?

• Wood

• Coal

• Petrol

• Natural Gas

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 do we use limewater to test for?

• Carbon Dioxide

• Water

• Heat

• Smoke

If a flame is giving off smoke, this type of combustion is occurring...

• Complete combustion

• Incomplete combustion

What is NOT product of complete combustion?

• carbon dioxide

• water

• carbon monoxide

• water

Incomplete combustion is harmful to humans because it ___________________.

• increases the level of sugar in the blood

• produces large amounts of carbon dioxide

• decreases the amount of sugar in the blood

• produces carbon monoxide that reduces the level of oxygen in the blood

Hydrocarbon fuel + oxygen ----> ___+____

(Select 2)

• CO₂

• O₂

• H₂O

• C_xH_y

The condition which are required for combustion to take place are:

• fuel
• ignition temperature
• oxygen
• all of these

Write a Balanced Equation for this reaction:
C₂H₄ + 2 O₂ -->

• C₂O₂ + H₄
• CO₂ + HOH
• CO + H
• 2 CO₂ + 2H₂O