Question

# Which of the following have highest boiling point?

A
CH3Cl
B
CH3CH2CH2Cl
C
CH3CH2CH2Br
D
CH3CH2CH2I

Solution

## The correct option is D $$CH_3CH_2CH_2I$$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.The boiling point increases with the increase in the molecular mass of the compound. Hence n-propyl iodide will have maximum boiling point among the given compounds. Chemistry

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