JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Mock Test - Surface Chemistry

For an adsorption of \[{{H}_{2}}\] on Ni surface \[Ni\left( s \right)+{{H}_{2}}\left( s \right)\to \] adsorbed \[{{H}_{2}}\] on Ni surface Variation of adsorption with temperature is shown in figure. This indicates that

A) it is an exothermic change

B) it is physical adsorption

C) Both [a] and [b]

D) None of the. Above

Correct Answer: C

Solution :

[c]

(1) As temperature increases, adsorption decreases. Thus, based on Le Chatelier's principles, it is an exothermic change. Thus it is correct

(2) Physical adsorption decreases with increase in temperature thus, correct.