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Solution


Q.

The correct sequence of bond enthalpy of 'C-X' bond is           [2021]
1 CH3-Cl>CH3-F>CH3-Br>CH3-I  
2 CH3-F<CH3-Cl<CH3-Br<CH3-I  
3 CH3-F>CH3-Cl>CH3-Br>CH3-I  
4 CH3-F<CH3-Cl>CH3-Br>CH3-I  

Ans.

(3)

The correct order of bond enthalpy is  

CH3-F>CH3-Cl>CH3-Br>CH3-I

Bond enthalpy∝1Bond length