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Q.

Wrong statement  among the following is

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a

Number of d-electrons in Fe+2are equal to number of p-electrons in Cl

b

Orbital angular momentum of 3d orbital is  6 h¯ h¯ = h2π

c

Energy of 2s orbital in  H > Li > Na >​K

d

Anamolous configuration is observed in Cr, Cu

answer is A.

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Detailed Solution

(1) FeZ=26......     Ar4s23d6Fe+2.....3d6ClZ= 17......1s22s22p63s23p5(2)Orbital angular momentum = ll+1h-  l=2 for d -orbital ;thus  orbital angular momentum =6 h-(3) Zeff ↑ , energy of the orbital in the same subshell  ↓(4) Cr…..  Ar4s13d5   Cu ……  Ar4s13d10
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