1.

Which of the following species cannot act as both Bronsted acid and base ?

Answer»

`H_(2)O`
`HCO_(3)^(-)`
`HSO_(4)^(-)`
`NH_(2)^(-)`

SOLUTION :`NH_(2)^(-)` can accept a proton but cannot GIVE a proton. Hence, it cannot act as both Bronsted acid and BASE.


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