Which of the following compound show a charge-transfer band?
(a)Lanthanum nitrate.
(b)Ceric ammonium nitrate
(c)Manganese (II) acetate
(d)Copper (II) sulphate pentahydrate
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Ce(IV) (f⁰) in ceric ammonium nitrate shows an intense O→Ce ligand-to-metal charge-transfer band (orange colour); La³⁺ and Mn²⁺/Cu²⁺ show no CT band in the visible (b).