For independent process at $300K$. Process $\Delta H/{\mathrm{kJmol}}^{-1}$ $\Delta S/{\mathrm{JK}}^{-1}$ $A$ $-25$ $-80$ $B$ $-22$ $40$ $C$ $25$ $-50$ $D$ $22$ $20$ The number of non-spontaneous process from the following is _____ .

JEE Main 2023 — Chemistry Physical Chemistry

2023integereasy

For independent process at $300K$ .

Process	$\Delta H/{\mathrm{kJmol}}^{-1}$	$\Delta S/{\mathrm{JK}}^{-1}$
$A$	$-25$	$-80$
$B$	$-22$	$40$
$C$	$25$	$-50$
$D$	$22$	$20$

The number of non-spontaneous process from the following is _____ .

Official previous-year question

Held on 24 Jan 2023 · Verified 6 Jul 2026.

Did you get this right?

Solution

The relation between change in Gibbs free energy, change in enthalpy and change in entropy can be written as follows,

$\Delta G=\Delta H-T\Delta S$

If $\Delta G$ is $+\mathrm{ve}$ , then the process is said to be non-spontaneous and if $\Delta G$ is $-\mathrm{ve}$ then the process is said to be spontaneous.

$A:\Delta G({\mathrm{Jmol}}^{-1})=-25\times {10}^{3}+80\times 300:-\mathrm{ve}$

$B:\Delta G({\mathrm{Jmol}}^{-1})=-22\times {10}^{3}-40\times 300:-\mathrm{ve}$

$C:\Delta G({\mathrm{Jmol}}^{-1})=25\times {10}^{3}+300\times 50;+\mathrm{ve}$

$D:\Delta G({\mathrm{Jmol}}^{-1})=22\times {10}^{3}-20\times 300:+\mathrm{ve}$

Processes $C$ and $D$ are non-spontaneous.

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JEE Main 2023 — Chemistry Physical Chemistry

2023integereasy

For independent process at $300K$ .

Process	$\Delta H/{\mathrm{kJmol}}^{-1}$	$\Delta S/{\mathrm{JK}}^{-1}$
$A$	$-25$	$-80$
$B$	$-22$	$40$
$C$	$25$	$-50$
$D$	$22$	$20$

The number of non-spontaneous process from the following is _____ .

Official previous-year question

Held on 24 Jan 2023 · Verified 6 Jul 2026.

Did you get this right?

Solution

The relation between change in Gibbs free energy, change in enthalpy and change in entropy can be written as follows,

$\Delta G=\Delta H-T\Delta S$

If $\Delta G$ is $+\mathrm{ve}$ , then the process is said to be non-spontaneous and if $\Delta G$ is $-\mathrm{ve}$ then the process is said to be spontaneous.

$A:\Delta G({\mathrm{Jmol}}^{-1})=-25\times {10}^{3}+80\times 300:-\mathrm{ve}$

$B:\Delta G({\mathrm{Jmol}}^{-1})=-22\times {10}^{3}-40\times 300:-\mathrm{ve}$

$C:\Delta G({\mathrm{Jmol}}^{-1})=25\times {10}^{3}+300\times 50;+\mathrm{ve}$

$D:\Delta G({\mathrm{Jmol}}^{-1})=22\times {10}^{3}-20\times 300:+\mathrm{ve}$

Processes $C$ and $D$ are non-spontaneous.

Your note

JEE Main Physical Chemistry in other years

Keep practicing Physical Chemistry

Work through every JEE Main Physical Chemistry PYQ, year by year.

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JEE Main 2023 — Chemistry Physical Chemistry

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Solution

Your note

JEE Main Physical Chemistry in other years

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JEE Main 2023 — Chemistry Physical Chemistry

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry