Question

The magnetic moment of a complex is $4.9$ B.M. Thus, unpaired electron(s) maybe _______

Answer 1

Magnetic moment of a complex is $4.9$ B.M. Thus, unpaired electrons may be 4. The expression for the magnetic moment is $\mu =\sqrt{n(n+2)}$
Substitute values in the above expression.
$4.9=\sqrt{n(n+2)}$
$24.01=n(n+2)$
Hence, $n=4$.