The heat of adsorption for physical adsorption is – 

(A) 20 - 40 KJ mol-1 

(B) 40 - 400 KJ mol-1 

(C) 5 -10 KJ mol-1 

(D) 50 -100 KJ mol-1

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1 Answers

Correct answer is (A) 20 - 40 KJ mol-1

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