Q.

The calculated magnetic moments (spin only value) for species FeCl42−,CoC2O433− and MnO42− respectively are:

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a

4.90, 0 and 1.73 BM

b

5.92, 4.90 and 0 BM

c

5.82, 0 and 0 BM

d

4.90, 0 and 2.83 BM

answer is A.

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Detailed Solution

FeCl42−,     CoC2O433−, MnO4−2No. of un -Paired electrons               4,                   0,                      1                                                    4.90,                   0,                  1.735
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The calculated magnetic moments (spin only value) for species FeCl42−,CoC2O433− and MnO42− respectively are: