Question

Which one is an example of heterogenous catalysis?

• A. Hydrolysis of sugar catalysed by H+ ions
• B. Decomposition of ozone in-presence of nitrogen monoxide
• C. Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron
• D. Oxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen

Answer 1

Answer: (C)

Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron

Answer 2

Heterogeneous catalysis refers to a catalytic process where the catalyst exists in a different phase (usually solid) from the reactants and products (usually gas or liquid phases). In option C, the reaction between dinitrogen and dihydrogen to form ammonia is catalyzed by finely divided iron, which is a solid catalyst. The reactants (dinitrogen and dihydrogen) are in the gas phase, while the catalyst (finely divided iron) is in the solid phase, making it an example of heterogeneous catalysis.

The correct option is (C): Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron