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A given sample of \( \mathrm{N}_{2} \mathrm{O}_{4} \) in a closed vessel shows \( 20 \% \) dissociation in \( \mathrm{NO}_{2} \) at \( 27^{\circ} \mathrm{C} \) and 760 torr. The sample is now heated upto \( 127^{\circ} \mathrm{C} \) and the analysis of mixture shows \( 60 \% \) dissociation at \( 127^{\circ} \mathrm{C} \).
\( K_{c} \) for decomposition of \( \mathrm{N}_{2} \mathrm{O}_{4} \) at \( 127^{\circ} \mathrm{C} \) is :
(A) \( 0.30 \)
(B) \( 0.12 \)
(C) \( 0.40 \)
(D) \( 0.25 \)
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