Which of the following ions are optically act | vedclass

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(C) An ion is optically active if it lacks a plane of symmetry or a center of inversion.$I$: This is the $trans-[Co(en)_2Cl_2]^+$ isomer. It has a pla

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$II$ and $III$

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(C) An ion is optically active if it lacks a plane of symmetry or a center of inversion.$I$: This is the $trans-[Co(en)_2Cl_2]^+$ isomer. It has a plane of symmetry and is optically inactive.$II$: This is the $cis-[Co(en)_2Cl_2]^+$ isomer. It lacks a plane of symmetry and is optically active.$III$: This is $[Co(en)_3]^{3+}$. It is a propeller-shaped complex that lacks a plane of symmetry and is optically active.$IV$: This is the $trans-[Co(en)_2Cl_2]^+$ isomer (same as $I$). It has a plane of symmetry and is optically inactive.Therefore,$II$ and $III$ are optically active.

Which of the following ions are optically active?

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