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Question

Platinum is used as a catalyst in:
  1. synthesis of methanol
  2. oxidation of ammonia to form nitric acid
  3. hydrogenation of oils
  4. production of synthetic rubber

A
oxidation of ammonia to form nitric acid
B
synthesis of methanol
C
hydrogenation of oils
D
production of synthetic rubber
Solution
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In the Ostwald process, ammonia is converted to nitric acid in a two step process. It is oxidised with oxygen in the presence of platinum catalyst. The overall reaction is as follows:
4NH3+5O24NO+6H2O

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