Year 8 Combustion Quiz

In a chemical equation, where do the reactants appear?

• On the right-hand side

• Above the arrow

• On the left-hand side

• Below the arrow

What is formed when iron reacts with oxygen?

• Copper oxide

• Iron oxide

• Carbon dioxide

• Water

What is a hydrocarbon?

• A compound of hydrogen and oxygen

• A compound of carbon and nitrogen

• A compound of hydrogen and carbon

• A compound of carbon and sulfur

What are the three things required for combustion to occur?

• Oxygen, heat, and water

• Oxygen, heat, and fuel

• Heat, fuel, and carbon dioxide

• Fuel, water, and carbon dioxide

What is the general equation for complete combustion?

• Fuel + oxygen → carbon monoxide + water

• Fuel + oxygen → carbon dioxide + water

• Fuel + oxygen → carbon dioxide + carbon monoxide

• Fuel + oxygen → water + carbon monoxide

What is a specific example of complete combustion?

• Methane + oxygen → carbon monoxide + water

• Propane + oxygen → carbon dioxide + water

• Ethanol + oxygen → carbon monoxide + water

• Butane + oxygen → carbon monoxide + water

What happens during incomplete combustion?

• There is too much oxygen available

• There is not enough oxygen available

• There is too much fuel available

• There is not enough fuel available

Why is incomplete combustion dangerous?

• It produces carbon dioxide

• It produces water

• It produces carbon monoxide

• It produces oxygen

What is a characteristic of carbon monoxide?

• It is a colorful gas

• It is a fragrant gas

• It is a colorless and odorless gas

• It is a visible and smelly gas

What is oxidation?

• A process where a substance loses oxygen

• A process where a substance gains oxygen

• A process where a substance gains hydrogen

• A process where a substance loses hydrogen