Question: The correct order of intensity of colors of the compounds is :
$\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}>\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
$\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}>\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
$\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
$\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
Correct Option: , 3
Solution:
