Addition of excess aqueous ammonia to a pink coloured aqueous solution of MCl_(2). 6H_(2)O (X) and NH_(4)Cl gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1 : 3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M.,whersas it is zero for complex Y. Among the following options, which statement (s) is (are) correct ?

Addition of excess aqueous ammonia to a pink coloured aqueous solution

1.	Addition of excess aqueous ammonia to a pink coloured aqueous solution of MCl_(2). 6H_(2)O (X) and NH_(4)Cl gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1 : 3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M.,whersas it is zero for complex Y. Among the following options, which statement (s) is (are) correct ?
Answer» The hybridisation of the central metal ION in Y is `d^(2) sp^(3)` Addition of silver nitrate to Y given only TWO equivalents os silver chloride When X and Y are in equilibrium at `0^(@)C`, the COLOUR of the solution is pink Z is a tetrahedral complex Answer :A::B::D