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For reaction (i): K1 = [NO]² / [N2][O2] and for reaction (ii): K2 = [N2]²[O2]¹/² / [NO]². Therefore K = 1 / K2².

1. K1 = [NO]² / [N2][O2]
2. K2 = [N2]²[O2]¹/² / [NO]²
3. K = 1 / K2²
4. K = K1 / K2

Correct answer: K = 1 / K2²

Solution

The given relationship K = 1 / K2² is consistent with the expressions for K1 and K2 provided in the question. This matches option C.

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