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Q.

Which of the following is chemisorption

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a

Adsorption of H2 on Ni at high temperature

b

Adsorption of H2 on charcoal

c

Adsorption of moisture on silica gel

d

Dehydration by using anhydrous CaCl2

answer is A.

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Detailed Solution

A) At low temperature hydrogen molecules get physically adsorbed on Nickel surfaceB) At high temperature H-H bonds are broken and H-atoms are chemically absorbed on Nickel surface
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