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For the reaction, N_2( ~g)+ O_2( ~g) ⇌ 2 NO( g), the equilibrium constant is K_1. The equilibrium constant is K_2 for 2 NO( g)+ O_2( ~g) ⇌ 2 NO_2(…

NEET UG 2011 — Chemistry Physical Chemistry

2011mcqhard

For the reaction, N2( g)+O2( g)⇌2NO(g)\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})N2​( g)+O2​( g)⇌2NO(g), the equilibrium constant is K1\mathrm{K}_1K1​. The equilibrium constant is K2\mathrm{K}_2K2​ for 2NO(g)+O2( g)⇌2NO2( g)2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_2(\mathrm{~g})2NO(g)+O2​( g)⇌2NO2​( g). What is K for the reaction NO2( g)⇌12 N2( g)+O2( g)?\mathrm{NO}_2(\mathrm{~g}) \rightleftharpoons \frac{1}{2} \mathrm{~N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) ?NO2​( g)⇌21​ N2​( g)+O2​( g)?

Official previous-year question

Held on 30 Apr 2011 · Verified 9 Jul 2026.

Options

  1. A

    1(K1K2)\frac{1}{\left(K_1 K_2\right)}(K1​K2​)1​

  2. B

    1(2K1K2)\frac{1}{\left(2 K_1 K_2\right)}(2K1​K2​)1​

  3. C

    1(4K1K2)\frac{1}{\left(4 K_1 K_2\right)}(4K1​K2​)1​

  4. D

    (1K1K2)1/2\left(\frac{1}{K_1 K_2}\right)^{1 / 2}(K1​K2​1​)1/2

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