Q. The correct order of the wavelength of light absorbed by the following complexes is, A. $[Co(NH_3)_6]^{3+}$ B. $[Co(CN)_6]^{3-}$ C. $[Cu(H_2O)_4]^{2+}$ D. $[Ti(H_2O)_6]^{3+}$ Choose the correct answer from the options given below:
A) B < D < A < C
B) B < A < D < C
C) C < D < A < B
D) C < A < D < B
Explanation
[Solution by Claude - not from source] Larger $\Delta_o$ means shorter wavelength absorbed. $\Delta$ order: $[Co(CN)_6]^{3-}>[Co(NH_3)_6]^{3+}>[Ti(H_2O)_6]^{3+}>[Cu(H_2O)_4]^{2+}$. So wavelength order: B < A < D < C. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.