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Discussion

Consider the following statements about the oxidation of sulphur dioxide.
1. The reaction is exothermic and reversible.
2. Lower temperature favours a higher equilibrium conversion.
3. The reaction proceeds with an increase in the number of moles.

  • A.3 only
  • B.1 only
  • C.All of them
  • D.1 and 2 only

Answer: D

The first two are correct. The third is wrong, because three moles become two, which is why raised pressure would favour conversion although in practice the process runs near atmospheric pressure. Compression would cost more than it returns here.

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