JEE Main Chemistry question

Which of the following diatomic molecules would be stabilised by the removal of an electron?

(A)
(B)CN
(C)
(D)Correct

Answer: (D)

Solution

Removing an electron increases bond order (and stability) only if the electron comes from an antibonding orbital. 's HOMO is the antibonding , so removing an electron gives

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Question ID VK-156277