The most stable oxides of nitrogen will be :

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2NO2(g)⇌N2(g)+2O2(g); K=6.7×1016molL−1

2N2O5(g)⇌2N2(g)+5O2(g); K=1.2×1024mol5L−5

2NO(g)⇌N2(g)+O2(g); K=2.2×1030

2N2O(g)⇌2N2(g)+O2(g); K=3.5×1033molL−1

answer is A.

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Detailed Solution

The value of keq is the measure of extent of reaction. For most stable oxide ⇒keq for its decomposition should be minimum.

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