Q. If the dipole moment of toluene and nitro-benzene are 0.43 D and 3.93 D, then what is the expected dipole moment of p-nitro toluene?
A) 3.50 D
B) 2.18 D
C) 4.36 D
D) 5.30 D
Explanation
(c)
Methyl group has $+ I\$effect and$- NO_{2}\$group has$- I\$effect$.$ Therefore, in p-nitro toluene the dipole moments of $–CH_{3}\$and$- NO_{2}$ groups act in the same direction. So, the resultant dipole moment is additive.
i.e., 3.93+0.43=4.36 debye
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.