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Chemistry

Explain the effect of sulphur dioxide on the atmosphere.

Pollution

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Answer

Effects of Sulphur dioxide on the atmosphere are :

  1. It mixes with smoke and fog to form smog, which is very harmful.
  2. It is oxidised by atmospheric oxygen into sulphur trioxide (SO3) which combines with water to form sulphuric acid. Sulphuric acid (H2SO4) is the cause of acid rain.
    2SO2 (g) + O2 (g) ⟶ 2SO3 (g)
    SO3 (g) + H2O (l) ⟶ H2SO4 (aq)
  3. It destroys vegetation and weakens building materials/constructions.
  4. It causes headache, vomiting and even death due to respiratory failure.

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