A) \[O(g)+{{e}^{-}}\to {{O}^{-}}(g)\]
B) \[S(g)+{{e}^{-}}\to {{S}^{-}}(g)\]
C) \[{{O}^{+}}(g)+{{e}^{~}}^{-}\to O(g)\]
D) \[{{O}^{-}}(g)+{{e}^{-}}\to {{O}^{2-}}(g)\]
Correct Answer: D
Solution :
[d] \[{{O}^{-}}\] ion repel the incoming electron thus energy is required to add incoming electron.
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