Q. The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
  • (A) [Fe(CO)5]
  • (B) [Fe(CN)6]3-
  • (C) [Fe(C2O4)3]3-
  • (D) [Fe(H2O)6]3+
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✅ Correct Answer: (C) [Fe(C2O4)3]3-

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