Chemistry · PYQ NEET UG 2017

CORRECT increasing order for the wavelengths of absorption in the visible region of the complexes of \( \text{Co}^{3+} \) is

1. A
   \( [\text{Co}(\text{H}_2\text{O})_6]^{3+} < [\text{Co}(\text{en})_3]^{3+} < [\text{Co}(\text{NH}_3)_6]^{3+} \)
2. B
   \( [\text{Co}(\text{H}_2\text{O})_6]^{3+} < [\text{Co}(\text{NH}_3)_6]^{3+} < [\text{Co}(\text{en})_3]^{3+} \)
3. C
   \( [\text{Co}(\text{NH}_3)_6]^{3+} < [\text{Co}(\text{en})_3]^{3+} < [\text{Co}(\text{H}_2\text{O})_6]^{3+} \)
4. D
   \( [\text{Co}(\text{en})_3]^{3+} < [\text{Co}(\text{NH}_3)_6]^{3+} < [\text{Co}(\text{H}_2\text{O})_6]^{3+} \)