JEE Main Chemistry question

The correct order of ionisation energy of C, N, O, F is [Manipal 2009]

(A)F < O < N < C
(B)F < N < C < O
(C)C < N < O < F
(D)C < O < N < FCorrect

Answer: (D)

Solution

Approximate first ionisation energies (kJ/mol): C = 1086, N = 1402, O = 1314, F = 1681. Because nitrogen's half-filled configuration is extra stable, its IE exceeds

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Question ID VK-133123