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Paramagnetic and coloured compound is

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K₂Cr₂O₇

(NH₄)₂[TiCl₆]

VOSO₄

K₃[Cu(CN)₄]

answer is C.

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Detailed Solution

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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