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Q.

Among the following, the species with the highest electron affinity is

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a

$O^{-}$

b

O

c

$F^{-}$

d

${Na}^{+}$

answer is B.

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Detailed Solution

Among the following, the species with the highest electron affinity is ${EA}_{2}$ is positive it means it requires energy to add that electron to O−

Therefore, the greater E.A is with O. (Really the more favorable E.A

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Among the following, the species with the highest electron affinity is