The number of correct | Surface Chemistry | JEE MAIN 2023

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JEE MAIN 2023

25-1-23 S2

Question

The number of incorrect statement/s from the following is/are $\_\_\_\_$
A. Water vapours are adsorbed by anhydrous calcium chloride.
B. There is a decrease in surface energy during adsorption.
C. As the adsorption proceeds, $\Delta \mathrm{H}$ becomes more and more negative.
D. Adsorption is accompanied by decrease in entropy of the system.

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Solution

Sol. 'A' water vapours are absorbed by calcium chloride.
C. As the adsorption proceeds, $\Delta \mathrm{H}$ becomes less and less negative.

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