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A+KBrtoYellowppt.(B) A+conc.H(2)SO(4)ove...

`A+KBrtoYellowppt.`(B)`
`A+conc.H_(2)SO_(4)overset(Delta)toBrown` vapour intensified with Cu-turnings.
Dissolves in hgyp forming a soluble complex(C ) What are (A),(B) and (C ) and explain their reraction?

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(A)`AgNO_(3)`(B)AgBr (C )`Na_(3)[Ag(S_(2)O_(3))_(2)]`
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