Q.

Which one is an example of heterogeneous catalysis ?

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a

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

b

Decomposition of ozone in presence of nitrogen monoxide

c

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

d

Hydrolysis of sugar catalysed by H+ ions

answer is A.

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Detailed Solution

When reactants and catalyst are present in different phases, they considered as heterogeneous catalysis

N2g+3H2gFes2NH3

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