Burning hydrocarbons | Exit Quiz | Oak National Academy

What word is used to describe the chemical combination of a substance with oxygen involving the production of heat and light?

Answer explanation

Combustion is the process where a substance reacts with oxygen to produce heat and light.

What are possible products for the complete combustion of methane (a hydrocarbon)?

• carbon dioxide + water

• carbon monoxide + water

• carbon + water

• methane + oxygen

• carbon dioxide + hydrogen

Answer explanation

Complete combustion of hydrocarbons like methane forms carbon dioxide and water.

What are possible products for the incomplete combustion of butane (a hydrocarbon)?

• carbon dioxide + water

• carbon monoxide + water

• carbon + water

• butane + oxygen

• carbon dioxide + hydrogen

Answer explanation

Possible products for the incomplete combustion of butane are: carbon + water, and carbon monoxide + water.

The chemical test for which gas is to relight a glowing splint?

Answer explanation

The chemical test for oxygen gas involves relighting a glowing splint.

True or false? Complete combustion releases larger amounts of energy than incomplete combustion of the same fuel.

• True

• False

Answer explanation

Complete combustion releases larger amounts of energy than incomplete combustion.

Which of the following shows a correctly balanced equation for the complete combustion of propene (C₃H₆)?

• 2C₃H₆ + 9O₂ → CO₂ + 6H₂O

• 2C₃H₆ + O₂ → 6CO₂ + 6H₂O

• 2C3H6 + 9O₂ → 6CO2 + 6H2O

• 2C₃H₆ + 9O₂ → 6CO₂ + 6H₂O

Answer explanation

This equation is correctly balanced: 2C₃H₆ + 9O₂ → 6CO₂ + 6H₂O, it has the same number of atoms of each element in the reactants and products, and the formula for each molecule is written correctly using subscript numbers.