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A metal nitrate reacts with KI to give a...

A metal nitrate reacts with KI to give a black precipitate, which on addition of excess of KI converts to orange colour solution. The cation of metal nitrate is :

A

`Hg^(2+) `

B

`Bi^(3+) `

C

`Pb^(2+)`

D

`Cu^(+)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Bi(NO_3)_3 (aq) + 3KI to BiI_3(s) + 3KNO_3 (aq)`
`BiI_3 + KI to underset("soluble")(K[BiI_4])`
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