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Question: Answered & Verified by Expert
If the equilibrium constant for N2g+O2(g)2NO(g) is K, the equilibrium constant for 12N2g+12O2(g)NO(g) will be:
ChemistryChemical EquilibriumNEETNEET 2015 (Phase 2)
Options:
  • A K12
  • B 12K
  • C K
  • D K2
Solution:
1285 Upvotes Verified Answer
The correct answer is: K12
\(\begin{aligned}
& \mathrm{N}_2(\mathrm{g})+\mathrm{O}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g}) ; \mathrm{K} \\
& \frac{1}{2} \mathrm{~N}_2(\mathrm{g})+\frac{1}{2} \mathrm{O}_2(\mathrm{g}) \rightleftharpoons \mathrm{NO}(\mathrm{g}) ; \mathrm{K}^\prime \\
& \mathrm{K}=\frac{\left[\mathrm{NO}^2\right.}{\left[\mathrm{N}_2\right]\left[\mathrm{O}_2\right]} \\
& \mathrm{K}^\prime=\frac{\mathrm{NO}}{\left[\mathrm{N}_2\right]^{1 / 2}\left[\mathrm{O}_2\right]^{1 / 2}} \\
& \therefore \mathrm{K}^\prime=\sqrt{\mathrm{K}}
\end{aligned}\)

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