MCQ
The complex with a maximum number of stereoisomers is
- A$[PtCl_3(C_2H_4)]^-$
- B$[CuBr_2Cl_2]^{2-}$
- C$[Co(C_2O_4)_3]^{3-}$
- ✓$[Cr(NH_3)_2(en)_2]^{3+}$
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$(I)$ Low enthalpy of dissociation of $F-F$ bond
$(II)$ High hydration enthalpy of $F^-$
$(III)$ Low atomisation enthalpy of $F_2$
Reason : $PbCl_4$ is powerful oxidising agent.