In the given complexes
(i) [CO(NH3)5(H2O)]3+ (ii) [CO(NH3)5Cl]2+ (iii) [CO(NH3)6]3+
The decreasing order of λ absorbed is
(1) (iii) > (ii) > (i)
(2) (iii) > (i) > (ii)
(3) (ii) > (i) > (iii)
(4) (ii) > (iii) > (i)
The correct option (3) (ii) > (i) > (iii)
Explanation:
λ absorbed depends on strength of ligand. For stronger ligand, Δ0 will be higher, λ will be lesser. NH3 > H2O > Cl- decreasing order of strength of ligand.
