Q.

Which of the order for ionisation energy is correct

Moderate

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Be > B > C > N > 0

B < Be < C < N < 0

B < Be < N < C < 0

answer is 2.

(Detailed Solution Below)

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Detailed Solution

Ionisation energy increases across the period but due to stable half filled configuration of VA group. its I.E. is more than VI-A group.

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