1.

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI is converted into orange colour solution. The cation of the metal nitrate is

Answer»

`Hg^(2+)`
`BI^(3+)`
`Pb^(2+)`
`CU^(+)`

Solution :`Bi(NO_(3))_(3)(AQ)+3KI(aq)tounderset(BiI_(3)(s))+3KNO_(3)(aq),BiI_(3)(s)+KI(aq)to underset("Orange")(K[BiI_(4)])`


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