Which of the following is not and example

eSaral Updated on:
Question:

Which of the following is not and example of heterogeneous catalytic reaction ?

  1. Ostwald's process

  2. Haber's process

  3. Combustion of coal

  4. Hydrogenation of vegetable oils

Correct Option: , 3

Solution:

Then is no catalyst is required for combustion of coal.

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