Which of the following statements is incorrect?

CHEMISTRY · Single correct · CBSE · Chemistry · Coordination Compounds · Coordination Compounds

Problem

Which of the following statements is incorrect? (1) The stability constant of

[\text{Co}(\text{NH}_3)_6]^{3+}

is greater than that of

[\text{Co}(\text{NH}_3)_6]^{2+}

(2) The cyano complexes are far more stable than those formed by halide ions (3) The stability of halide complexes follows the order

\text{I}^- < \text{Br}^- < \text{Cl}^-

(4) The stability constant of

[\text{Cu}(\text{NH}_3)_4]^{2+}

is greater than that of

[\text{Cu}(\text{en})_2]^{2+}