Question

For a given alkyl group, the boiling points of alkyl halides follow the order:

• A. $RI>RBr>RCl$
• B. $RCl>RBr>RI$
• C. $RI>RCl>RBr$
• D. $RBr>RI>RCl$

Answer 1

The correct option is A $RI>RBr>RCl$

For the same alkyl group, the boiling point of haloalkanes decreases in the order $RI>RBr>RCl>RF.$ This is due to the increase in van der Waals forces when the size and mass of the halogen atom increases.