MHT CET202411 May 2024Evening ShiftChemistryCoordination CompoundsActual
Which among the following is a correct decreasing order of thermodynamic stability of the complexes?
Options
- A[ Co ( NH ₃ )₆ ]³⁺ [ Ag ( CN )₂ ]⁻ [ Cu ( CN )₄ ]²⁻
- B[ Co ( NH ₃ )₆ ]³⁺ [ Cu ( CN )₄ ]²⁻ [ Ag ( CN )₂ ]⁻
- C[ Ag ( CN )₂ ]⁻ [ Co ( NH ₃ )₆ ]³⁺ [ Cu ( CN )₄ ]²⁻
- D[ Cu ( CN )₄ ]²⁻ [ Ag ( CN )₂ ]⁻⁻ [ Co ( NH ₃ )₆ ]³⁺ .
Correct answer
B. [ Co ( NH ₃ )₆ ]³⁺ [ Cu ( CN )₄ ]²⁻ [ Ag ( CN )₂ ]⁻
Step-by-step solution
Higher the charge on the central metal ion, higher is the stability of the complex. The order of oxidation state of metal ions in the given complex is Co ³⁺ Cu ²⁺ Ag ⁺ .