The complex that can show optical activity is :

The complex that can show optical activity is :

$trans - {[Cr ({Cl}_{2}) (Ox)_{2}]}^{3 -}$
$trans - {[Fe {({NH}_{3})}_{2} {(CN)}_{4}]}^{-}$
$cis - {[Fe {({NH}_{3})}_{2} (CN)_{4}]}^{-}$
$cis - {[{CrCl}_{2} {(ox)}_{2}]}^{3 -} (ox = oxalate)$

Solution

Only

cis - {[{CrCl}_{2} {(OX)}_{2}]}^{3 -}

show optical isomerism while its trans form do not show optical isomerism due to presence of plane of symmetry.

Asked in: JEE Main 2020 (03 Sep Shift 1)

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