Question
The compound with no dipole moment is
A.
methyl chloride
B.
carbon tetrachloride
C.
methylene chloride
D.
chloroform
Answer :
carbon tetrachloride
Solution :
TIPS/Formulae :
i) Dipole moment is vector quantity. When vector sum of all dipoles in molecule will be zero, then molecule will not have net dipole moment.
(ii) NOTE: For net dipole moment to be equal to zero, all the atoms attached to central atom must be identical and geometry must be regular.
∴ Carbon tetrachloride having regular geometry and identical atoms attached to bonds has zero dipole moment.
TIPS/Formulae :
i) Dipole moment is vector quantity. When vector sum of all dipoles in molecule will be zero, then molecule will not have net dipole moment.
(ii) NOTE: For net dipole moment to be equal to zero, all the atoms attached to central atom must be identical and geometry must be regular.
∴ Carbon tetrachloride having regular geometry and identical atoms attached to bonds has zero dipole moment.