JEE Main Chemistry question

Chemistry The p-Block Elements JEE Main

Which oxide of nitrogen is most stable?

(A)2NO₂(g)⇌N₂(g)+2O₂(g); K=6.7×10¹⁶ mol litre⁻¹Correct
(B)2NO(g)⇌N₂(g)+O₂(g); K=2.2×10³⁰ mol litre⁻¹
(C)2N₂O₅(g)⇌2N₂(g)+5O₂(g); K=1.2×10³⁴ mol⁻⁵litre⁻⁵
(D)2N₂O(g)⇌2N₂(g)+O₂(g); K=3.5×10³³ mol litre⁻¹

Answer: (A)

Solution

The oxide with the smallest decomposition-equilibrium constant is the least dissociated, hence most stable (NO₂).

Question ID VK-136087