Question

Which one is an example of a heterogeneous catalyst?

विकल्प

• Hydrolysis of sugar catalysed by H⁺ ions.

• Decomposition of ozone is presence of nitrogen monoxide.

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

• Oxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen.

Answer 1

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

Explanation:

Let us write the reactions for all the options.

\[\ce{C12H22O11_{(aq)} + H2O ->[H^+] C6H12O6_{(aq)} + C6H12O6_{(aq)}}\]

It is a homogeneous reaction.

\[\ce{2O3_{(g)} ->[NO_{(g)}] 3O2_{(g)}}\]

It is a homogeneous reaction.

\[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}}\]

Reactants and catalyst are in different phases.

It is a heterogeneous reaction.

\[\ce{SO2_{(g)} + 1/2 O2_{(g)} ->[NO_{(g)}] SO3_{(g)}}\]