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(C) In a $d^6$ low spin complex,the presence of a strong field ligand causes the electrons to pair up in the lower energy $t_{2g}$ orbitals.For a $d^6

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(C) In a $d^6$ low spin complex,the presence of a strong field ligand causes the electrons to pair up in the lower energy $t_{2g}$ orbitals.For a $d^6$ configuration,all $6$ electrons occupy the $t_{2g}$ orbitals $(t_{2g}^6 e_g^0)$.Since all electrons are paired,the number of unpaired electrons $(n)$ is $0$.The magnetic moment $(\mu)$ is calculated using the formula $\mu = \sqrt{n(n 2)} \ B.M.$Substituting $n = 0$,we get $\mu = \sqrt{0(0 2)} = 0 \ B.M.$

Magnetic moment of $d^6$ low spin complex is ........ $B.M.$

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