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The catalyst used in the contact process is

  • A.nickel supported on alumina
  • B.vanadium pentoxide on silica
  • C.finely divided platinum only
  • D.iron oxide promoted with alumina

Answer: B

Vanadium replaced platinum because it is far cheaper and much less easily poisoned by arsenic. Iron oxide belongs to ammonia synthesis and nickel to hydrogenation duties. Platinum was used in the earliest contact plants.

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