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An aqueous solution of metal ion M(1) re...

An aqueous solution of metal ion `M_(1)` reacts separately with reagents Q and R in excess to gie tetrahedral and sqaure planar complexes, respectively. An aqueous solution of another metal ion `M_(2)` always forms tetrahedral complexes with these reagents. Aqueous solution of `M_(2)` on reaction with reagent S gives white precipitate which dissolves in excess of S. The reaction are summarised in the scheme given below
Scheme

`M_(1), Q` and R, respectively are

A

`Zn^(2+), KCN` and `HCl`

B

`Ni^(2+), HCl` and `KCN`

C

`Cd^(2+), KCN` and `HCl`

D

`Co^(2+), HCl` and `KCN`

Text Solution

Verified by Experts

The correct Answer is:
B
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