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Chemistry · Oct / Nov 2020 · Paper 12 · Question 26

5070Air quality and climate

The table contains some facts about sulfur dioxide and sulfuric acid and comments on these facts. Which row is correct?

  1. AIn the manufacture of sulfuric acid, sulfur reacts with oxygen to make sulfur trioxide. | The equation for this reaction is 2S(s) + 3O2(g) ⇌ 2SO3(g).
  2. BNickel is used as the catalyst in the Contact process. | Catalysts speed up a reaction by lowering the activation energy, Ea.
  3. CSulfuric acid is used in car batteries. | This increases the efficiency of the petrol engine.
  4. DThe use of low sulfur petrol is beneficial because it minimises the formation of acid rain. | Sulfur dioxide is acidic because it is the oxide of a non-metal.

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Correct answer: D. The use of low sulfur petrol is beneficial because it minimises the formation of acid rain. | Sulfur dioxide is acidic because it is the oxide of a non-metal.

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