9. Polar molecules tend to have intermolecular forces when compared to nonpolar molecules.

1. weaker
2. explosive
3. stronger
4.identical

3, non polar causes the molecule to not have a twin molecule. polar just means it has a correspondent

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.