Given below are two statements: Statement I : The number of pairs, from the following, in which both the ions are coloured in aqueous solution is 3. [ Sc ³⁺, Ti ³⁺ ], [ Mn ²⁺, Cr ²⁺ ], [ Cu ²⁺, Zn ²⁺ ] and [ Ni ²⁺, Ti ⁴⁺ ] Statement II : Th ⁴⁺ is the strongest reducing agent among Th ⁴⁺, Ce ⁴⁺, Gd ³⁺ and Eu ²⁺ . In the light of the above statements, choose the correct answer from the options given below

Step-by-step solution

[Sc³⁺, Ti³⁺] has Sc³⁺ colorless (no d-electrons) and Ti³⁺ colored; [Mn²⁺, Cr²⁺] has Mn²⁺ colorless (d⁵ half-filled, no d-d transitions) and Cr²⁺ colored; [Cu²⁺, Zn²⁺] has Cu²⁺ colored and Zn²⁺ colorless (d¹⁰ filled); [Ni²⁺, Ti⁴⁺] has Ni²⁺ colored and Ti⁴⁺ colorless (no d-electrons). Zero pairs have both ions colored. Statement I is FALSE. Th⁴⁺ is not a reducing agent. Statement II is FALSE. Both statements are false.