Addition of excess aqueous ammonia to a pink coloured aqueous solution of MC l _ 2 . 6 H _ 2 O ( X ) and N H _ 4 Cl gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1 : 3

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Correct answer: A. When X and Z are in equilibrium at 0°C, the colour of the solution is pink

Cobalt salts are pink in anhydrous & blue in hydrated form
Addition of excess aqueous ammonia to a pink coloured aqueous solution of MC l _ 2 . 6 H _ 2 O ( X ) and N H _ 4 Cl

Addition of excess aqueous ammonia to a pink coloured aqueous solution of MC l _ 2 . 6 H _ 2 O ( X ) and N H _ 4 Cl

(i) Hybridisation of (Y) is ${d}^{2}s{p}^{3}$ as $N{H}_{3}$ is a strong field ligand

(ii) ${\left[CoC{l}_{4}\right]}^{2 -}$ have $s{p}^{3}$ hybridisation as $C{l}^{-}$ is a weak field ligand

(iii) Addition of excess aqueous ammonia to a pink coloured aqueous solution of MC l _ 2 . 6 H _ 2 O ( X ) and N H _ 4 Cl

(iv) Addition of excess aqueous ammonia to a pink coloured aqueous solution of MC l _ 2 . 6 H _ 2 O ( X ) and N H _ 4 Cl

Addition of excess aqueous ammonia to a pink coloured aqueous...

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