JEE Main 2026 Chemistry question
Which of the following complexes will show coordination isomerism? A. [Ag(NH₃)₂][Ag(CN)₂] B. [Co(NH₃)₆][Cr(CN)₆] C. [Co(NH₃)₆][Co(CN)₆] D. [Fe(NH₃)₆][Co(CN)₆] E. [Co(NH₃)₆][Fe(CN)₆] Choose the correct answer from the options given below:
Answer: (B)
Solution
Coordination isomerism needs genuinely different metal environments to exchange ligands between. In A, any mixed-ligand Ag species would be neutral, not able to form an alternative cation/anion
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