For the compounds

Question:

For the compounds $\mathrm{CH}_{3} \mathrm{Cl}, \mathrm{CH}_{3} \mathrm{Br}, \mathrm{CH}_{3} \mathrm{I}$ and $\mathrm{CH}_{3} \mathrm{~F}$, the correct order of increasing $\mathrm{C}$-halogen bond length is :

  1. $\mathrm{CH}_{3} \mathrm{~F}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{I}$

  2. $\mathrm{CH}_{3} \mathrm{~F}<\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{I}$

  3. $\mathrm{CH}_{3} \mathrm{Cl}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{~F}<\mathrm{CH}_{3} \mathrm{I}$

  4. $\mathrm{CH}_{3} \mathrm{~F}<\mathrm{CH}_{3} \mathrm{I}<\mathrm{CH}_{3} \mathrm{Br}<\mathrm{CH}_{3} \mathrm{Cl}$


Correct Option: , 2

Solution:

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