1
Question
For a catalyst to be highly active, the reactants should adsorbed to catalyst:
For a catalyst to be highly active, the reactants should adsorbed to catalyst:
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Solution
The correct option is C reasonably strongly so that the rate of desorption of product is fast
Mechanism of heterogeneous catalyst:
Gas molecules are held up on the surface due to loose chemical combination. 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.
The activity of a catalyst depends upon the strength of chemisorption to a large extent.
Reactants must get adsorbed reasonably strongly on to the catalyst to become active.
However, adsorption shouldn’t be very strong that reactants are immobilized which is result in the low rate of desorption of product from the catalyst surface.
Hence, for a catalyst to be highly active the reactant should mildly attached to the catalyst so that after the formation of product it should be easily desorbed from the surface of catalyst.
Mechanism of heterogeneous catalyst:
Gas molecules are held up on the surface due to loose chemical combination. 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.
The activity of a catalyst depends upon the strength of chemisorption to a large extent.
Reactants must get adsorbed reasonably strongly on to the catalyst to become active.
However, adsorption shouldn’t be very strong that reactants are immobilized which is result in the low rate of desorption of product from the catalyst surface.
Hence, for a catalyst to be highly active the reactant should mildly attached to the catalyst so that after the formation of product it should be easily desorbed from the surface of catalyst.
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