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Byju's Answer
Standard XII
Chemistry
Chemical Reactivity
Electron affi...
Question
Electron affinity is positive, when
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Solution
The change from
O
−
to
O
2
−
is endothermic because
O
−
repels the incoming electron due to its negative charge hence, it needs additional energy to accept the electron. So, the electron affinity is positive.
Hence, option (b) is correct answer.
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