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KCET2021Chemistryd and f Block Elements

Which of the following pairs has both the ions coloured in aqueous solution? [Atomic numbers of Sc =21, Ti =22, Ni =28, Cu =29, Mn =25 ]

Options

  1. ASc ³⁺, Mn ²⁺
  2. BNi ²⁺, Ti ⁴⁺
  3. CTi ³⁺, Cu ⁺
  4. DMn ²⁺, Ti ³⁺

Correct answer

D. Mn ²⁺, Ti ³⁺

Step-by-step solution

Only option (d) (i.e. Mn ²⁺, Ti ³⁺ pair) is coloured in aqueous solution.

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