Q. The order of energy absorbed which is responsible for the color of complexes A. $[Ni(H_2O)_2(en)_2]^{2+}$ B. $[Ni(H_2O)_4(en)]^{2+}$ and C. $[Ni(en)_3]^{2+}$ is
A) B > A > C
B) A > B > C
C) C > B > A
D) C > A > B
Explanation
[Solution] en is a stronger field ligand than $H_2O$; more en ligands give a larger $\Delta_o$ and higher energy absorbed: C > A > B. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.