Question

Both geometrical and optical isomerism are shown by :

• A. [Co(en)2Cl2]+
• B. [Co(NH3)5Cl]2+
• C. [Co(NH3)4Cl2]+
• D. [Cr(OX)3]3–

Answer 1

Answer: (A)

$Co(en)2Cl2$+

Answer 2

(1) [Co(en)2Cl2]+ show geometrical isomerism and its only cis-form show optical isomerism.

(2) [Co(NH3)5Cl]2+ exists only in one form.

(3)

It does not shows optical isomerism because of the presence of plane of symmetry and centre of symmetry.

(4) [Cr(OX)3]3– shows optical isomerism but does not show geometrical isomerism because of the same type of ligands.