Q. The complex cation which has two isomers is:
A) $\left[\mathrm{Co(H_2O)_6}\right]^{3+}$
B) $\left[\mathrm{Co(NH_3)_5Cl}\right]^{2+}$
C) $\left[\mathrm{Co(NH_3)_5NO_2}\right]^{2+}$
D) $\left[\mathrm{Co(NH_3)_5Cl}\right]^{+}$
Explanation
The correct answer is Option C: $\left[\mathrm{Co(NH_3)_5NO_2}\right]^{2+}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.