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Which one of the following forms with an...

Which one of the following forms with an excess of `CN^(-)` (Cyanide) a complex having coordination number two

A

`Cu^+`

B

`Ag^+`

C

`Ni^(2+)`

D

`Fe^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
B
With an excess of `CN^- , Ag^+` form a complex with coordination no. 2 as `[Ag(CN)_2]^-` . This complex is used in the extraction of silver metal by reacting it with Zn dust.
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