For the compounds CH 3 Cl, CH 3 Br, CH 3 I and CH 3 F, the correct order of increasing C-halogen bond length is :

Step-by-step solution

C-halogen bond length totally depends on the electronegativity difference between Carbon and halogen. The more the difference and the less is the bond length. The electronegativity order of halogens is I < Br < Cl < F . Hence, the correct order of increasing C-halogen bond length is CH 3 F < CH 3 Cl < CH 3 Br < CH 3 I . Or we can say that as the size of halogen increases C-halogen bond length also increases.