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IAT IISER2024ChemistryCoordination Compounds

The following complex ions absorb in the ultraviolet-visible region of light. Which one of these shows violet colour? [ CoCl ( NH ₃ )₅ ]²⁺, [ Co ( H ₂ O ) ( NH ₃ )₅ ]³⁺, [ Co ( NH ₃ )₆ ]³⁺, and [ Co ( CN )₆ ]³⁻

Options

  1. A[ Co ( H ₂ O ) ( NH ₃ )₅ ]³⁺
  2. B[ Co ( CN )₆ ]³⁻
  3. C[ CoCl ( NH ₃ )₅ ]²⁺
  4. D[ Co ( NH ₃ )₆ ]³⁺

Correct answer

C. [ CoCl ( NH ₃ )₅ ]²⁺

Step-by-step solution

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