PtCl4.6H2O can exist as a hydrated complex 1 molal aq. solution has depression in freezing point of 3.72o. Assume 100% ionization and Kf(H2O)=1.86o mol−1 kg, then complex is

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[Pt(H2O)6]Cl4

[Pt(H2O)4Cl2]Cl2.2H2O

[Pt(H2O)3Cl3]Cl.3H2O

[Pt(H2O)2Cl4].4H2O

answer is C.

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Detailed Solution

ΔTf=i×m×kfi=3.721.86×1=2So salt is (Pt(H2O)3Cl3)Cl.3H2O

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