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Which one of the following ionic species...

Which one of the following ionic species has the greatest proton affinity to form stable compound ?

A

`I^(-)`

B

`HS^(-)`

C

`NH_(2)^(-)`

D

`F^(-)`

Text Solution

Verified by Experts

The correct Answer is:
C
Strongest proton affinity will be for species which is the strongest base or whose conjugate acid is the weakest. The conjugate acid of `NH_(2)^(-)` is `NH_(3)` which is the weakest acid out of HI, `H_(2)S,NH_(3)` and `HF`.
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