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Chemistry

Vanadium pentoxide is used as a catalyst in the preparation of:

  1. Nitrogen gas
  2. Nitrogen dioxide gas
  3. Sulphur trioxide gas
  4. Carbon dioxide gas

Sulphuric Acid

ICSE 2022

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Answer

Sulphur trioxide gas

Reason — Vanadium pentoxide is used during contact process for the preparation of sulphur trioxide gas.

2SO2+O2450500°C /12 atmosV2O52SO3+45 K cals2\text{SO}2 + \text{O}2 \xrightleftharpoons [450-500\text{\degree C }/1 - 2 \text{ atmos}]{\text{V}2\text{O}5} 2\text{SO}_3 + \text{45 K cals}

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