Reactions and Properties of Sulfur Dioxide

What are two natural sources of sulfur dioxide (SO2) in the environment?

• Burning fossil fuels and industrial emissions.

• Volcanic gas and certain sulfur springs.

• Automobile exhaust and agricultural runoff.

• Decomposition of organic matter and forest fires.

Which environmental problem is primarily caused by sulfur dioxide (SO2)?

• Ozone depletion.

• Global warming.

• Acid rain.

• Eutrophication.

What is a primary industrial use of sulfur dioxide (SO2)?

• As a disinfectant for water.

• In the manufacture of sulfuric acid.

• For bleaching textiles.

• As a component in fertilizers.

Which equation correctly represents the laboratory preparation of sulfur dioxide (SO2) from copper?

• Cu(s) + H2SO4(aq) → CuSO4(aq) + SO2(g) + H2O(l)

• Cu(s) + 2H2SO4(aq) → CuSO4(aq) + SO2(g) + 2H2O(l)

• Cu(s) + O2(g) → CuO(s)

• Cu(s) + HCl(aq) → CuCl2(aq) + H2(g)

How is sulfur dioxide typically collected in a laboratory?

• Upward displacement of air

• Downward displacement of water

• Downward delivery of air

• Upward delivery of air

What are the characteristic color and odor of sulfur dioxide?

• Colorless with a pungent smell

• Yellow with a rotten egg smell

• Brown with a sweet smell

• Blue with no smell

Why is it advisable to prepare sulfur dioxide in a fume cupboard or a well-ventilated area?

• It is highly flammable.

• It is a poisonous gas.

• It is highly reactive with air.

• It is explosive.

What effect does a solution of sulfur dioxide in water have on blue litmus paper?

• It turns blue litmus paper red.

• It turns blue litmus paper green.

• It turns blue litmus paper purple.

• It has no effect on blue litmus paper.

What is the product formed when sulfur dioxide reduces nitric acid?

• Sulfuric acid and nitrogen dioxide

• Sulfur and nitrogen monoxide

• Sulfuric acid and nitrogen monoxide

• Sulfur and nitrogen dioxide

How does the bleaching action of sulfur dioxide differ from that of chlorine?

• Sulfur dioxide bleaches by oxidation, while chlorine bleaches by reduction.

• Sulfur dioxide bleaches by reduction, while chlorine bleaches by oxidation.

• Both sulfur dioxide and chlorine bleach by oxidation.

• Both sulfur dioxide and chlorine bleach by reduction.