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

An aqueous solution of metal ion M_(1) reacts separately with reagents

1.	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
Answer» `Zn^(2+), KCN` and `HCl` `Ni^(2+), HCl` and `KCN` `CD^(2+), KCN` and `HCl` `CO^(2+), HCl` and `KCN` ANSWER :B