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Question

Question: Which of the following molecules has highest dipole moment?...

Which of the following molecules has highest dipole moment?

A

CH3CH2CH2ClCH_{3}CH_{2}CH_{2}Cl

B

CH3CH2CH2CH2ClCH_{3}CH_{2}CH_{2}CH_{2}Cl

C

CH3CH(CH3)CH2ClCH_{3}CH(CH_{3})CH_{2}Cl

D

(CH3)3CCl(CH_{3})_{3}CCl

Answer

CH3CH2CH2CH2ClCH_{3}CH_{2}CH_{2}CH_{2}Cl

Explanation

Solution

for the same halogen, boiling point of alky halide decreases as the size of the alkyl group decreases. For isomeric alkyl halides, boiling point decreases as branching increases. So the decreasing order of boiling point is

CH3CH2CH2CH2Cl>CH3CH2CH2Cl>CH3CH(CH3)CH2Cl>(CH3)3CClCH_{3}CH_{2}CH_{2}CH_{2}Cl > CH_{3}CH_{2}CH_{2}Cl > CH_{3}CH(CH_{3})CH_{2}Cl > (CH_{3})_{3}CCl