InterviewSolution
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InterviewSolution
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An aqueous solution of metal ion `MI` reacts separately with reagents `Q` and `R` in excess to give tetrahedral and square planar complexes, respectively An aqueous solution of another metal ion `M2` always forms tetrahedral complexs with theses reagents. Aqueous solution of `M2` on reaction with reagent `S` gives white precipitate which dissolves in excess of `S` The reactions are summarised in the scheme given below: `SCHEME` : what is M2 and S??A. `Zn^(2+)`, KCN, HCI and `K_(4)[Fe(CN)_(6)]`B. `Ni^(2+)`, HCI, KCN and KOHC. `Cd^(2+),KCN,HCl` and `Na_(2)HPO_(4)`D. `Co^(2+)`, HCI, KCN and `K_(2)CrO_(4)` |
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Answer» Correct Answer - B `underset("Tetrahedral")([NiCl_(4)]^(2-))overset(HCl(Q))underset("excess")larr underset((M_(1)))(Ni^(2+))overset(KCN(R ))underset("excess")rarr underset("square planar")([Ni(CN)_(4)]^(2-))` `underset("Tetrahedral")([ZnCl_(4)]^(2-))overset(HCl(Q))underset("excess")larrunderset(darr) underset((M_(2)))(Zn^(2+))overset(KCN(R ))underset("excess")rarr underset("Tetrahedral")([Zn(CN)_(4)]^(2-))` `underset("white ppt.")(Zn(OH)_(2))overset(KOH)underset("excess")rarr[Zn(OH)_(4)]^(2-)` |
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