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Question

Spin-only magnetic moment of [Co(NH3)3(H2O)3]Cl3 (in BM) is :

A
Zero
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B
3
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C
24
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D
35
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Solution

The correct option is A Zero
Oxidation state of Co is +3 in the complex
Electronic configuration of Cr+3 is [Ar]3d6,Co3+ is nearly always low-spin. It forms d2sp3 hybridisation and contains zero unpaired electrons.
Hence,
Also, μ=n(n+2)=0
112882_76944_ans_ed4bf62a5faa4576b7bbef03d736cd44.png

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