Question
12. Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is (1) [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+ (2) [Co(H2O)6]3+, [Co(en)3]3+[Co(NH3)6]3+ (3) [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+ (4) [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+