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Question

Which statements are correct ?

i) physical adsorption is due to Vander Waal’s forces

ii) physical adsorption decreases at high temperature

iii) physical adsorption is irreversible

iv) enthalpy for a chemical adsorption is generally lesser than that of physical adsorption


A

i, ii & iv

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B

i, ii & iii

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C

i, ii

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D

i& iv

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Solution

The correct option is D

i, ii


Physical adsorption is reversible in nature & enthalpy for a chemical adsorption is higher than that of physical adsorption


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