The rate of chemisorption :

decreases with increase of pressure

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increases with increase of pressure

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is independent of pressure

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is independent of temperature

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Solution

The correct option is C is independent of pressure
Chemisorption is the result of the formation of a chemical bond between the adsorbate and the adsorbent.

Formation of a chemical is mostly affected by the reactivity of the species involved and not significantly affected by the pressure of the surroundings. But very high pressures are favourable for chemisorption.

So within normal pressure ranges, chemisorption in independent of pressure.

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