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Q.

Which one of the following is correct regarding physisorption ?

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a

It involves chemical bonds between adsorbent and adsorbate

b

Enthalpy of adsorption is about 80-240 kJ mol–1

c

It is reversible in nature

d

It results in unimolecular layer only on adsorbent surface under high pressure

answer is C.

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Detailed Solution

the attractions between adsorbate and adsorbent are very weak  ,physical adsorption is reversible
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Which one of the following is correct regarding physisorption ?