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Question

Among the following compounds which is both paramagnetic and coloured?

A
K2Cr2O7
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B
[Co(SO4)]
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C
(NH4)2[TiCl6]
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D
K3[Cu(CN)4]
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Solution

The correct option is A [Co(SO4)]
Co(SO4)Co2+[Ar]3d7
1. Paramagnetic.
2. And it is has red colour due to its unpaired electrons.

1175090_936096_ans_e7b5606e0abb4430ba55944540990f0d.PNG

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