The species among the following which can act as an acid and as a base is

Options

A. `HSO_(4)^(-)`
B. `SO_(4)^(2-)`
C. `H_(3)O^(+)`
D. `Cl^-`

Answer

A

Explanation

The species which can accept as well as donate `H^+` iron can act both as an acid and a base.
`{:(HSO_(4)^(-)+H^(+) harr H_(2)SO_(4)),(" Base "):}`
`{:(HSO_(4)^(-) harr SO_(4)^(2-)+H^(+)),(" Acid "):}`