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Which of the following is/are true for heterogenous catalysis?
It takes place at the surface of the catalyst rather than at the bulk.
Gas molecules are held up in the bulk due to strong chemical combination.
One gas molecule gets adsorbed at a time without reacting with each other.
None of the above
Answers (1)
Mechanism of Heterogenous Catalysis:
The surface of the catalyst unlike the inner part of the bulk, has free valencies which provide the seat for chemical forces of attraction.
Gas molecules are held up on the surface due to loose chemical combinations. Different molecules are adsorbed side by side and react with each other forming new molecules.
Formed product molecules may evaporate leaving the surface for the fresh reactant molecules.
Hence option 1 is correct.
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