NEET UG 2023 — Chemistry Physical Chemistry

2023mcqhard

The equilibrium concentrations of the species in the reaction $A+B\rightleftharpoons C+D$ are $2,3,10\mathrm{and}6\mathrm{mol}{L}^{-1}$ respectively at $300K$ . $\Delta {G}^{\circ }$ for the reaction is

$(R=2\mathrm{cal}/\mathrm{mol}K)$

Official previous-year question

Held on 30 Apr 2023 · Verified 9 Jul 2026.

Options

A
$-13.73\mathrm{cal}$
B
$-1372.60\mathrm{cal}$
C
$-137.26\mathrm{cal}$
D
$-1381.80\mathrm{cal}$

Did you get this right?

Solution

$A+B\Leftrightarrow C+D \mathrm{at}\mathrm{equilibrium}23106$

${K}_{\mathrm{eq}}=\frac{[C][D]}{[A][B]} {K}_{\mathrm{eq}}=\frac{10\times 6}{2\times 3}=10 \Delta Gº=–\mathrm{RT}\mathrm{ln}K$

Where $R$ is the gas constant, $T$ is the temperature in Kelvin, and $K$ is the equilibrium constant of the reaction.

$\Delta G=-2.303\times 2\times 300\times {\mathrm{log}}_{10}10 =-2.303\times 2\times 300\times 1 =-1381.8\mathrm{cal}$

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NEET UG 2023 — Chemistry Physical Chemistry

2023mcqhard

$(R=2\mathrm{cal}/\mathrm{mol}K)$

Official previous-year question

Held on 30 Apr 2023 · Verified 9 Jul 2026.

Options

A
$-13.73\mathrm{cal}$
B
$-1372.60\mathrm{cal}$
C
$-137.26\mathrm{cal}$
D
$-1381.80\mathrm{cal}$

Did you get this right?

Solution

$A+B\Leftrightarrow C+D \mathrm{at}\mathrm{equilibrium}23106$

${K}_{\mathrm{eq}}=\frac{[C][D]}{[A][B]} {K}_{\mathrm{eq}}=\frac{10\times 6}{2\times 3}=10 \Delta Gº=–\mathrm{RT}\mathrm{ln}K$

Where $R$ is the gas constant, $T$ is the temperature in Kelvin, and $K$ is the equilibrium constant of the reaction.

$\Delta G=-2.303\times 2\times 300\times {\mathrm{log}}_{10}10 =-2.303\times 2\times 300\times 1 =-1381.8\mathrm{cal}$

NEET UG 2023 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

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NEET UG 2023 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

NEET UG Physical Chemistry in other years

More NEET UG Physical Chemistry questions

Other Chemistry topics for NEET UG

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry