Year 10 Pollution

Fuels obtained from the fractions of crude oil may contain impurities. Which of the following could be an impurity which causes pollution?

• Sulfur

• Water

• Rock

• Sand

What does sulfur form when it is combusted in oxygen? Write the name of the substance.

In what way does sulfur dioxide cause an environmental problem?

• It blackens buildings

• It dissolves in water to form acid rain

• It prevents blood from transporting oxygen round the body.

• It causes smog

Which statement is not correct about the pollutant sulfur dioxide?

• It can be removed from car exhaust gases by a catalytic converter.

• It can be removed from power station flue gases by reaction with calcium oxide.

• It can cause respiratory problems.

• It can cause acid rain.

Sulfur dioxide (SO₂) is produced when some fossil fuels are burned. Which of the following statements is true?

• Sulfur dioxide can be removed from waste gases in a power station by an acid-base reaction with calcium oxide.

• Sulfur dioxide is insoluble in water.

• Sulfur dioxide is a basic oxide.

• Sulfur dioxide is an ionic compound.

Nitrogen oxides can form when....

• fuels burn at low temperatures

• fuels burn at high temperatures

Carbon and carbon monoxide can be produced in combustion reactions where....

• there is not enough nitrogen.

• there is not enough fuel.

• there is not enough oxygen.

• the temperature is low.

Which two substances produced during hydrocarbon fuel combustion can lead to the formation of acid rain?

• carbon and sulfur dioxide

• nitrogen oxides and sulfur dioxide

• nitrogen monoxide and carbon monoxide

• carbon dioxide and sulfur dioxide

Which of the following statements about acid rain is false?

• It forms when nitrogen oxides mix with clouds.

• Burning fuels that contain sulfur impurities can contribute to acid rain

• It releases soot into the atmosphere.

• It kills trees and fish in lakes

Which of the following is a direct consequence of sulfur dioxide pollution?

• Increased UV radiation

• Global warming

• Ozone layer depletion

• Acid rain formation