NEET UG 2010 — Chemistry Physical Chemistry

2010mcqeasy

In which of the following equilibrium $\mathrm{K}_C$ and $\mathrm{K}_{\mathrm{P}}$ are not equal ?

Official previous-year question

Held on 30 Apr 2010 · Verified 9 Jul 2026.

Options

A
$2 \mathrm{NO}(\mathrm{g}) \rightleftharpoons \mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$
B
$\mathrm{SO}_2(\mathrm{~g})+\mathrm{NO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_3(\mathrm{~g})+\mathrm{NO}(\mathrm{g})$
C
$\mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$
D
$2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{CO}_2(\mathrm{~g})$

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Solution

Key Idea The reaction for which the number of moles of gaseous products $\left(n_{\mathrm{p}}\right.$ ) is not equal to the number of moles of gaseous reactants $\left(\mathbf{n}_{\mathrm{R}}\right)$ , has different value of $\mathrm{K}_{\mathrm{c}}$ and $\mathrm{K}_{\mathrm{p}}$ . (a) $\boldsymbol{n}_{\mathrm{P}}=\mathbf{n}_{\mathrm{R}}=2$ , thus, $\mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$ (b) $\mathrm{n}_{\mathrm{P}}=\mathrm{n}_{\mathrm{R}}=2$ , thus, $K_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$ (c) $\mathrm{n}_{\mathrm{P}}=\mathrm{n}_{\mathrm{R}}=2$ , thus, $\mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$ (d) $n_p=2, n_R=1$ , thus, $K_p \neq K_c$

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Options

$2 \mathrm{NO}(\mathrm{g}) \rightleftharpoons \mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$

$\mathrm{SO}_2(\mathrm{~g})+\mathrm{NO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_3(\mathrm{~g})+\mathrm{NO}(\mathrm{g})$

$\mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$

$2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{CO}_2(\mathrm{~g})$

Solution

NEET UG 2010 — Chemistry Physical Chemistry

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NEET UG 2010 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

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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