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Magnetic, the moment of Xn+(Z=26) is 24 B.M. Hence, the number of unpaired electrons and the value of n respectively are :

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a
4, 2
b
2, 4
c
3, 1
d
0, 2

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detailed solution

Correct option is A

Magnetic moment = n(n + 2) = 24 B.M. 
∴No. of unpaired electron = 4

X26:1s22s22p63s23p63d64s2

To get 4 unpaired electrons, the outermost configuration will be 3d6

 No. of electrons lost = 2 (from 4s2 ). 

 n = 2.

The correct option is A.

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