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Manipal MET2012ChemistrySurface Chemistry

Which of the following reaction requires catalyst?

Options

  1. AS + O ₂ SO ₂
  2. BC + O ₂ CO ₂
  3. C2 SO ₂+ O ₂ 2 SO ₃
  4. DAll of the above

Correct answer

C. 2 SO ₂+ O ₂ 2 SO ₃

Step-by-step solution

Reaction (a) and (b) are exothermic and spontaneous so do not need catalyst. On the . other hand, conversion of SO ₂ into SO ₃ need catalyst. Catalyst used for this reaction may be Pt or V ₂ O ₅ (contact process) or NO (lead chamber process) 2 SO ₂+ O ₂ ~V ₂ O ₅ 2 SO ₃

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