wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following molecules has highest dipole moment ?

A
CH3Cl
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
CH2Cl2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
CHCl3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
CCl4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A CH3Cl
Dipole is a physical quantity. Methane has zero dipole moment. Replacement of one H- atoms by Cl atom increases the dipole moment. The increase in dipole moment is because the bond dipole moment of C - H bond and that of C-Cl bond reinforce each other. Replacement of another H atom by Cl increases the bond angle due to lone pair - lone pair repulsion between Cl- atoms. This reduces the dipole moment and introduces the third Cl - atom. So when fourth Cl - atom is introduced the molecule (CCl4) again becomes symmetrical and dipole moment reduces to zero.So, CH3Cl has highest dipole moment.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Physical Properties
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon