Q. Which of the following molecules has the maximum dipole moment ?
A) $CO_2$
B) $CH_4$
C) $NH_3$
D) $NF_3$
Explanation
[Solution] In $NH_3$ the lone-pair moment adds to the bond moments; in $NF_3$ they oppose; $CO_2$ and $CH_4$ are non-polar. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.