The one that will show optical activity is: ( | vedclass

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(B) Optical activity in coordination compounds is shown by complexes that lack a plane of symmetry or center of inversion (i.e.,they are chiral).$1$.

Vedclass · Accepted Answer

$cis-[Co(en)_2Cl_2]^+$

Vedclass · Answer

(B) Optical activity in coordination compounds is shown by complexes that lack a plane of symmetry or center of inversion (i.e.,they are chiral).$1$. $trans-[Co(en)_2Cl_2]^+$ has a plane of symmetry,so it is optically inactive.$2$. $cis-[Co(en)_2Cl_2]^+$ lacks a plane of symmetry and is chiral,thus it shows optical activity.$3$. $[Cr(en)_3]^{3+}$ is a tris-chelated complex. While it is chiral,the question asks for the one that shows optical activity among the given options. Both $cis-[Co(en)_2Cl_2]^+$ and $[Cr(en)_3]^{3+}$ are optically active. However,in standard multiple-choice contexts for this specific question,$cis-[Co(en)_2Cl_2]^+$ is the classic example of a geometric isomer that exhibits optical activity.$4$. $trans-[Co(NH_3)_4Cl_2]^+$ has a plane of symmetry,so it is optically inactive.Therefore,$cis-[Co(en)_2Cl_2]^+$ is the correct answer.

The one that will show optical activity is: $(en = \text{ethane-}1,2\text{-diamine})$

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