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Q.

Which of the following has maximum unpaired d-electrons?

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a

Zn+

b

Fe2+

c

Ni3+

d

Cu+

answer is B.

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Detailed Solution

Fe(Z = 26)...[Ar]4s23d6Fe+2...[Ar]3d6Number of unpaired electrons = 4Number of unpaired electrons in Zn+(4s13d10, n = 1); Ni+3(3d7, n = 3) and Cu+(3d10, n = 0)
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