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Q.

Which one of the following is not applicable to the phenomenon of adsorption?

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a

ΔH>0

b

ΔG<0

c

ΔS<0

d

ΔH<0

answer is A.

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Detailed Solution

For phenomenon of adsorption ΔH<0, i.e. enthalpy change during phenomenon of adsorption is negative because during adsorption, there is always a decrease in residual forces of the surface which lead to decrease in surface energy that appears as heat.
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