1.

An aqueous solution of a metal nitrate yields a white precipitate on treatment with aqueous Na_(2)SO_(3) solution. Precipitate dissolves in NaOH(aq) solution forming a complex anion X. Also, the orginal sample of solution yields a white precipitate on treatment with dilute HCl solution, which dissolves in boiling water. The most likely formula of the complex anion (X) is

Answer»

`[Ag(OH)_(2)]^(-)`
`[Ag(OH)_(4)]^(-)`
`[ZN(OH)_(4)]^(2-)`
`[Pb(OH)_(4)]^(2-)`

Answer :D


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