NEET2017Chemistry-Coordination Compounds
NEET 2017 Chemistry Crystal Field Theory MCQ Question
Type: MCQ-conceptual-Hard-Class 12
CORRECT increasing order for the wavelengths of absorption in the visible region of the complexes of Co³⁺ is:
A
[Co(H₂O)₆]³⁺, [Co(en)₃]³⁺, [Co(NH₃)₆]³⁺
B
[Co(H₂O)₆]³⁺, [Co(NH₃)₆]³⁺, [Co(en)₃]³⁺
C
[Co(NH₃)₆]³⁺, [Co(en)₃]³⁺, [Co(H₂O)₆]³⁺
D
[Co(en)₃]³⁺, [Co(NH₃)₆]³⁺, [Co(H₂O)₆]³⁺
Correct Answer
Option B
Detailed Explanation
The absorption wavelength depends on the ligand field strength: H₂O < NH₃ < en, leading to increasing wavelength.
Found an issue with this question?