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Adsorption of gases on solid surface is ...

Adsorption of gases on solid surface is exhothermic since

A

enthalpy is positive

B

entropy is negative

C

entropy increases

D

free energy increases

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The correct Answer is:
B
During adsorption, the molecules of adsorbate (i.e., gaseous molecules) are held on the surface of the adsorbent leading to the decrease in randomness. Therefore, entropy decreases, i.e., `DeltaS` is negative.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 10-PAPER 1 (PHYSICS & CHEMISTRY)
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