Question -The correct order of decreasing dipole moment is:
Options:
A .  CH3Cl, CH3Br, CH3F
B .  CH3Cl, CH3F, CH3Br
C .  CH3Br, CH3Cl, CH3F
D .  CH3Br, CH3F, CH3Cl
Answer: Option B : B Dipole moment decreases with decrease in electronegativity of halogen. Fluorides have lower dipole moment than chlorides because of smaller C-F bond length which outweights the effect of greater electronegativity
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