What will be the correct order for the wavelengths of absorption in the visible region for the following: '[Ni(NO₂)₆ ]⁴⁻ ,[N i(NH₃)₆]²⁺,[Ni(H₂O)]^2+

Explanation

Ans: The order of the ligand in the spectrochemical series:
.H_2 OltNH_3ltNO_2^-.
Hence the wavelength of the light obseryed will be in the order:
.[Ni(H_2 O)_6]^2+lt[Ni(N H_3)_6]^2+lt[Ni(NO_2)_6]^2-.
Thus, wavelengths absorbed .(E=hc / lambda). will be in the opposite order. ..[Ni_ NO_2^epsilon)_6]^+lt[Ni(NH_3)_6^prime]_1^3+lt[N i(H_2 O)_6]^2 *.