The central metal ion is${\mathrm{sp}}^3{\mathrm{d}}^2$ hybridised in Brown ring complex $\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{NO}\right]{\mathrm{SO}}_4$.The magnetic moment (spin only) of the complex is $\sqrt{\mathrm{x}}$ BM. Find the value of $\mathrm{x}$.