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Question

Which of the following paramagnetic ions would exhibit magnetic moment (Spin only) of the order 5 BM? (Atomic number Mn = 25, Cr = 24, V = 23, Ti = 22)

A
V2+
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B
Ti2+
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C
Mn+2
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D
Cr2+
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Solution

The correct option is D Cr2+
Configuration of ,
V2+[Ar]4s03d3 n=3
Ti2+[Ar]4s03d2 n=2
Mn2+[Ar]4s03d5 n=5
Cr2+[Ar]4s03d4 n=4
Hence spin moment of Cr2+=4(4+2)4.92BN5BM

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