If X and Y are the carbon-halogen bond enthalpies in chloroethane and bromoethane respectively, what is the relationship between X and Y?

If X and Y are the carbon-halogen bond enthalpies in chloroethane and bromoethane respectively, what is the relationship between X and Y? Correct Answer X < Y

Since the C-F bond length will be shorter than the C-Cl bond length due to the smaller size of F atom, it will require more energy to break the C-F bond, hence the enthalpy value of C-Cl bond will be lower than that of C-F bond.
Bissoy MCQ

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