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Q.

Which of the following is not correct

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a

Physical adsorption decreases with increase in temperature.

b

Physical adsorption is multi layered

c

Activation energy of physical adsorption is very high

d

Magnitude of  Enthalpy change of physical adsorption is about 20kJ mol-1

answer is C.

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Detailed Solution

Due to weak vanderwaal forces, activation energy of physical adsorbtion is lowAnd the heat of energy released is very low,   âˆ†Hphysisorption=-20KJ/mole
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