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MHT CET202617 April 2026Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which from following catalysts is used in contact process of industrial production of sulfuric acid using SO ₂ and O ₂ (air).

Options

  1. ANi (finely divided)
  2. BPlatinised asbestos
  3. CCo-Th
  4. DFe-Cr

Correct answer

B. Platinised asbestos

Step-by-step solution

The contact process is used for the industrial production of sulfuric acid. The key step in this process is the catalytic oxidation of sulfur dioxide ( SO ₂ ) to sulfur trioxide ( SO ₃ ) using oxygen ( O ₂ ) from the air. The reaction is: 2 SO ₂(g) + O ₂(g) 2 SO ₃(g) This reaction is catalyzed by platinised asbestos or vanadium pentoxide ( V ₂ O ₅ ). Among the given options, platinised asbestos is the correct catalyst. Finely divided Ni is used in the hydrogenation of oils. Co-Th is used in Fischer-Tropsch synthesi

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