A) \[H{{S}^{-}}\]
B) \[NH_{2}^{-}\]
C) \[{{F}^{-}}\]
D) \[{{I}^{-}}\]
Correct Answer: C
Solution :
Proton affinity i.e., basicity depends upon the strength of H-A bond (where, A = S, N, F, I). \[{{F}^{-}}\] forms the strongest bond. So, it has the greatest proton affinity to form hydride.
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