Verified Solution • 2025–26 Session moderate

QNEET-2016-Ch-1043: NEET 2016 Chemistry - Class 12 NEET-2016-Ch-1043 Solution: Which one of the following characteristics is associated with…

Which one of the following characteristics is associated with adsorption?

\Delta G

and

\Delta H

are negative but

\Delta S

is positive.

\Delta G

and

\Delta S

are negative but

\Delta H

is positive.

\Delta G

is negative but

\Delta H

and

\Delta S

are positive.

\Delta G \Delta H

and

\Delta S

all are negative.

Multiple Choice Options

A $\Delta$ _ G and $\Delta$ _ H are negative but $\Delta$ _ S is positive.
B $\Delta$ _ G and $\Delta$ _ S are negative but $\Delta$ _ H is positive.
C $\Delta$ _ G is negative but $\Delta$ _ H and $\Delta$ _ S are positive.
D $\Delta$ _ G, $\Delta$ _ H and $\Delta$ _ S all are negative.

Step-by-Step Verified Solution

Adsorption is spontaneous process, therefore change in the free energy ( _ G) for the process is negative. As we know that _ G = _ H � T _ S S is negative because adhering of gas molecules to the surface lowers the randomness. _ _ G can be �ve only when _ H is �ve.

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