Aqueous solution of Ni²⁺ contains ${\left[\mathrm{Ni}\left({\mathrm{H}}_2{\mathrm{O}}_6\right)\right]}^{2+}$ and its magnetic moment is  2.83 BM. When ammonia is added in it, comment on the magnetic moment of solution
 

Both the complexes ${\left[\mathrm{Ni}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$and ${\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$forms outer orbital complexes in order to exhibits ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybridization (octahedral geometry). Hence electrons are not paired in both the complexes and magnetic moment remains same as 2.83 BM.