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  4. The correct order of electron affinity of B, C, N, O is

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Q. The correct order of electron affinity of $B, C, N, O$ is

Chhattisgarh PMTChhattisgarh PMT 2004

Solution:

The correct order of electron affinity of $B , C , N , O$ is $O > C > B > N$.
On moving left to right in a period, the electron affinity becomes more negative.
$N$ has positive electron affinity due to extra stability of exactly half-filled $p$ orbitals.