See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

The order of ligand strength in the spectrochemical series F–  H2O  NH3  NO2 –. And CFSE for octahedral complex is Fe+2 < Co+2 due to high ENC . A strong ligand causes a larger degree of splitting resulting in high value of E (energy). Therefore, corresponding low value of  hc E        