Question

Which cation from following does NOT form colourless compound?

(Atomic number - Cu = 29, Ti = 22, Zn = 30, Sc = 21)

विकल्प

• Ti³⁺

• Cu¹⁺

• Sc³⁺

• Zn²⁺

Answer 1

Ti³⁺

Explanation:

Ti³⁺ = 4s⁰ 3d¹

Cu¹⁺ = 4s⁰ 3d¹⁰

Sc³⁺ = 4s⁰ 3d⁰

Zn²⁺ = 4s⁰ 3d¹⁰

Ti³⁺ forms colored compounds as it has unpaired electrons.