Electronaffinityis positivewhen

1.	Electronaffinityis positivewhen
Answer» O changesinto `O^(-)` `O^(-)`changesinto `O^(2-)` O changesinto `O^(+)` electronaffinityis alwaysnegative Solution :Sinceelectronaffinityis negative of electrongain enthalpythereforeelectronaffinity is + vewhenO CHANGES to`O^(-)`i.e.,OPTION(a) is CORRECT.

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