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 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 magneticmoment of X and Z is 3.87 B.M., where it is zero for complex Y. Among the following options, which statemens(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 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 magneticmoment of X and Z is 3.87 B.M., where it is zero for complex Y. Among the following options, which statemens(s) is (are) correct
Answer» The hybridization of the central metal ion in Yis `d^(2)sp^(3)` Additoin of silver nitrate to Y gives only two EQUIVALENTS of silver chloride When X and Z are in equilibrium of `0^(@)C` ,the coloure of the solution in pink Z is a tetrahedral complex Solution :`[Co(H_(2)O)_(6)]Cl_(2)underset(NH_(4)Cl+"Air")overset(NH_(3)(aq))(rarr)[Co(NH_(3))_(6)]Cl_(3)` Blue solution ( Tetrahedral , `sp^(3))` X `&` Z in equilibrium at `0^(@)Cimplies ` Then equilibrium is shifted towards X, makinig colour of solution pink