Q. [Co(NH₃)₄(NO₂)₂]Cl exhibits :
A) linkage isomerism, ionization isomerism and optical isomerism
B) linkage isomerism, ionization isomerism and geometrical isomerism
C) ionization isomerism, geometrical isomerism and optical isomerism
D) linkage isomerism, geometrical isomerism and optical isomerism
Explanation
[Solution from source] NO₂⁻ can bind through N (nitro) or O (nitrito), giving linkage isomers. Exchanging Cl⁻ with a coordinated NO₂⁻ gives ionisation isomers, and the two NO₂ ligands can be cis or trans, giving geometrical isomers. Neither cis nor trans [Co(NH₃)₄(NO₂)₂]⁺ is chiral, because each has mirror planes, so optical isomerism is absent. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.