Assertion : In complex $\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4 \mathrm{BrCl}\right]\mathrm{Cl},$ the 'spin only' magnetic moment is close to 1.73 B.M.

Reason : All known mononuclear complexes of chromium (III), irrespective of the strength of the

               ligand field, must have three unpaired electrons.

Assertion : tris (ethane-1, 2-diamine) nickel(II) chloride is homoleptic outer orbital complex

Reason : The geometry of Ni in tris (ethane-1, 2-diamine) nickel(II) chloride is trigonal bipyramidal.

Assertion : Bis(dimethylglyoximato)nickel(II) can show geometrical isomerism.

Reason : Tetrahedral complexes with chiral structure exhibit optical isomerism.

Assertion : The magnitude of charge density for a given ligand increases as the charge on the metal

                  ion increases.

Reason : ${\mathrm{NH}}_3$ is a weak field ligand towards ${\mathrm{Co}}^{2+}$ but acts as a strong field ligand towards ${\mathrm{Co}}^{3+}.$