A) Adsorption is always exothermic
B) Physisorption may transform into chemisorption at high temperature
C) Physisorption increases with increasing temperature but chemisorption decreases with increases temperature
D) Chemisorption is more exothermic than physisorption, however it is very slow due to higher energy of activation.
Correct Answer: D
Solution :
(a)\[\Delta H=-\] ve for adsorption fact chemical bonds are stronger than vander waal's forces so chemical adsorption is more exothermic.
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