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Chemistry Question on Haloalkanes and Haloarenes

For the compounds CH3Cl,CH3Br,CH3I {CH3Cl, CH3Br, CH3I } and CH3F {CH3F}, the correct order of increasing C-halogen bond length is:

A

\ceCH3F<CH3Cl<CH3Br<CH3I\ce{CH3F < CH3Cl < CH3Br < CH3I}

B

\ceCH3F<CH3Br<CH3Cl<CH3I\ce{CH3F < CH3Br < CH3Cl < CH3I}

C

\ceCH3F<CH3I<CH3Br<CH3Cl\ce{CH3F < CH3I < CH3Br < CH3Cl}

D

\ceCH3Cl<CH3Br<CH3F<CH3I\ce{CH3Cl < CH3Br < CH3F < CH3I}

Answer

\ceCH3F<CH3Cl<CH3Br<CH3I\ce{CH3F < CH3Cl < CH3Br < CH3I}

Explanation

Solution

The correct order of increasing bond length is CH3F<CH3Cl<CH3Br<CH3I {CH3F < CH3Cl < CH3Br < CH3I}