Which of the following statements is not correct?

  • A
    The stability constant of $[Co(NH_3)_6]^{3+}$ is greater than that of $[Co(NH_3)_6]^{2+}$.
  • B
    Among $F^{-}, Cl^{-}, Br^{-}$ and $I^{-}, F^{-}$ forms the strongest complexes due to its small size.
  • C
    $[Cu(NH_3)_4]^{2+}$ is thermodynamically more stable than $[Zn(NH_3)_4]^{2+}$.
  • D
    Among $[Fe(CN)_6]^{3-}, [Fe(H_2O)_6]^{2+}$ and $[Fe(en)_3]^{3+}$,$[Fe(CN)_6]^{3-}$ is the least stable.

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