Multiple choice

Which of the following statements is incorrect?

  1. [Mn(CN)6]3-, [Fe(CN)6]3- and [Co(C2O4)3]3- are diamagnetic inner orbital complexes that involve d2sp3 hybridisation.

  2. The ligand field strength increases in the order SCN- < C2O42- < NCS- < en < CO.

  3. [Mn2(CO)10] has one Mn-Mn bond and [Co2(CO)8] has one Co-Co bond.

  4. [MnCl6]3-, [FeF6]3- and [CoF6]3- are paramagnetic outer orbital complexes that involve sp3d2 hybridisation.

  5. M-C bond length in [Fe(CN)6]3- is lower than that in [Mn(CN)6]3-.
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A Correct answer
Explanation

Correct Answer: [Mn(CN)6]3-, [Fe(CN)6]3- and [Co(C2O4)3]3- are diamagnetic inner orbital complexes that involve d2sp3 hybridisation.

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