Answer:
The alkenes are shown below in the drawing, indicating which is more polar.
Explanation:
In the first pairs of alkenes, the 1-butene have a dipole moment due to the inductive effect of the group, instead the trans-2-butene do not present it since the dipoles are counteracted.
In the second pair of alkenes the cis hex-2-ene is more polar because the substituents provide greater dipole moment to the molecule.
For the last pair of alkenes, the same happens as in the first pair of alkenes, in the hex-3-ene trans compound the dipole moments are canceled.
