Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Question Explanation:

Identify which given molecules are polar and therefore have a non-zero dipole moment.

Concept:

This question is based on Dipole moment and molecular symmetry.

Solution:

1. 2,2-Dimethylpropane

→ perfectly symmetrical, dipole moment = 0.

2. Trans-Pent-2-ene → trans arrangement cancels dipoles, but due to unsymmetrical groups, dipoles do not cancel 100% → μ > 0

3. cis-Hex-3-ene → cis arrangement creates net dipole → μ ≠ 0.

4. Benzene → highly symmetrical → μ = 0.

Thus, only molecules 2 and 3 are polar.