Question

Which of the following are incorrect
A) Co+3 forms high spin complex with strong as well as weak field ligands in octahedral complex
B) For Co+3 low spin octahedral complex configuration is t2g^4eg^4
C) Co+3 acts as oxidizing agent in aqueous solution
D) Co+3 acts as reducing agent in aqueous solution

Answer 1

The options (A), (B) and (D) are incorrect.

- [Co(NH₃)₆]³⁺ is a low spin complex of Co³⁺ with a strong field lig and.

- So option (A) is incorrect.

- In the low spin complex  [Co(NH₃)₆]³⁺, the t2g⁴eg⁴ configuration is impossible.

- So option (B) is also incorrect.

- Co³⁺ is a strong oxidizing agent in aqueous solution.

- Hence, option (C) is also correct and option (d) is incorrect.