Coordination CompoundHard

Question

Which of the following statements is incorrect ?

Options

A.Potassium amminetetracyanidonitrosoniumchromate(I) having μ = 1.73 B.M has d2sp3 hybridisation.
B.K3[AlF6] + BF3 → AlF3 + 3K[BF4]
C.[Cr(NH3)6]Cl3 and [Cu(NCCH3)4] [BF4] both are coloured .
D.[Cr(NH3)4Cl2]Br can show ionisation isomerism with [Cr(NH3)4ClBr]Cl

Solution

(C) [Cr(NH3)6]Cl3 is coloured as it has three unpaired electrons while [Cu(NCCH3)4] [BF4] is colourless as Cu(I) i.e. 3d10 electron configuration has all electrons paired, so there is no d-d transition of electron.

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