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Q.

The spin magnetic moment of cobalt in the compound Hg[Co(SCN)4] is

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a

8

b

24

c

3

d

15

answer is B.

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Detailed Solution

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Hg[Co(SCN)4], Co(Z = 27) ⇒3d7 4s2, Co2+=3d7

Question Image

Unpaired electrons, n = 3

Magnetic moment =√n(n+2)=√3(3+2)=√15 BM

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