Select the correct statement:

Options

A. Chelation effect is maximum for five and six membered rings
B. Greater the charge on the central metal cation, greater the value of `Delta(CFSE)`
C. In complex ion `[CoF_(6)]^(3-),F^(-)` is a weak field ligand, so that `Delta_(oct) lt P`(Pairng energy) and it is low spin complex
D. `[CoCl_(2)(NH_(3))_(2)(en)]^(o+)` complex ion will have four different isomers

Answer

A, B, D

Explanation