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Q.

Paramagnetic and coloured compound is

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a

(NH4)2[TiCl6]

b

VOSO4

c

K2Cr2O7

d

K3[Cu(CN)4]

answer is C.

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Detailed Solution

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The color is possibly due to d-d transition as the central metal ion (V+4) has one electron in its d-orbital. The electrons possibly absorb and emit electromagnetic radiation in the visible spectrum. The color is Blue.

 

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Paramagnetic and coloured compound is