Quiz on Combustion and Chemical Reactions

What is a fuel?

• A substance that is burned to release energy

• A liquid used for cleaning

• A type of metal

• A form of water

What does the term "combustion" mean?

• The process of freezing

• The process of burning

• The process of melting

• The process of evaporating

What happens when a substance burns?

• It reacts with water

• It reacts with oxygen

• It reacts with nitrogen

• It reacts with carbon dioxide

What is the test for oxygen?

• It turns limewater milky

• It relights a glowing splint

• It extinguishes a flame

• It changes blue litmus paper red

What is the word equation for the complete combustion of carbon?

• Carbon + Oxygen → Carbon Dioxide

• Carbon + oxygen → carbon monoxide

• Carbon + Hydrogen → Methane

• Carbon + Nitrogen → Ammonia

What is the test for carbon dioxide?

• It turns limewater milky

• It relights a glowing splint

• It changes red litmus paper blue

• It produces a popping sound

What is meant by incomplete combustion? SELECT TWO ANSWERS

• Incomplete produces carbon monoxide

• Incomplete produces carbon dioxide

• incomplete combustion happens when there is not enough oxygen

• Complete combustion happens when there is plenty of oxygen

What is the hazard symbol associated with carbon monoxide?

• A flame

• A skull and crossbones

• A tree and fish

• A hand and test tube

What is the word equation for the combustion of hydrogen?

• Hydrogen + Oxygen → Water

• Hydrogen + Nitrogen → Ammonia

• Hydrogen + Carbon → Methane

• Hydrogen + Sulfur → Hydrogen Sulfide

What is the test for hydrogen?

• Burns with a squeaky pop

• It turns limewater milky

• It extinguishes a flame

• It changes blue litmus paper red