If the equilibrium constant for N2(g) + O2(g) 2NO(g) is K, the equilibrium constant for 12 N2(g) + 12 O2(g) NO(g) will be
(4) K1/2
For N2(g) + O2(g) 2NO(g): K = [NO]2[N2][O2]
For 12N2(g) + 12O2(g) NO(g): K' = [NO][N2]1/2[O2]1/2
⇒ K' = ( [NO]2[N2][O2] )1/2 = K1/2
∵ When a balanced equation is multiplied by a factor n, the equilibrium constant is raised to the power n (here n = 12).
Answer: (4)
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