Question

Which of the following are arranged in the decreasing order of dipole moment?

• A. $CH_{3}Cl, CH_{3}Br, CH_{3}F$
• B. $CH_{3}Cl, CH_{3}F, CH_{3}Br$
• C. $CH_{3}Br, CH_{3}Cl, CH_{3}F$
• D. $CH_{3}Br, CH_{3}F, CH_{3}Cl$

Answer 1

Answer: (B)

$CH_{3}Cl, CH_{3}F, CH_{3}Br$

Answer 2

The values of dipole moments of methyl halides: $CH_{3}F - 1.51 D ; CH_{3}Cl -1.56 D;$ $CH_{3}Br -1.4 D; CH_{3}I - 1.29D$ $\therefore CH_{3}Cl > CH_{3}F > CH_{3}Br > CH_{3}I$