Question

For which of the following dipole moment is zero?
A) But-1-yne
B) Cis but-2-ene
C) Trans but-2-ene
D) Trans pent-2-ene

Answer 1

Answer:

For which of the following dipole moment is zero?

D) Trans pent-2-ene

Answer 2

Among the given compounds, the dipole moment of trans but-2-ene is zero.

• The dipole moment is a way to determine the strength of polarity of chemical bonds (due to the electronegativity difference) in a given molecule.
• It is represented by an arrow whose head faces on the negative side.
• In trans-but-2-ene, the two individual dipole moments cancel out each other, and hence the dipole moment of the compound is equal to zero.