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Coordination Compounds

Section: Chemistry

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Question : 22 of 49

Marks: +1, -0

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

\mathrm{MCl}_2\cdot\mathrm{H}_2\mathrm{O}

\mathrm{NH_4Cl}

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., whereas it is zero for complex Y. Among the following options, which statement(s) is(are) correct ?

[JEE Adv 2017 P1]

Z is a tetrahedral complex
The hybridization of the central metal ion in Y is $d^2sp^3$
Addition of silver nitrate to Y gives only two equivalents of silver chloride
When X and Z are in equilibrium at 0°C, the colour of the solution is pink

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