GENERAL KNOWLEDGE

Detailed explanation-1: -Therefore, dispersion forces increase with increasing molecular weight.

Detailed explanation-2: -Molecular Size Larger and heavier atoms and molecules exhibit stronger dispersion forces than smaller and lighter ones. In a larger atom or molecule, the valence electrons are, on average, farther from the nuclei than in a smaller atom or molecule. They are less tightly held and can more easily form temporary dipoles.

Detailed explanation-3: -Answer and Explanation: Dispersion forces increase with increasing molar mass. This is because the dispersion forces rely on the contacts between molecules.

Detailed explanation-4: -Generally, London dispersion forces depend on the atomic or molecular weight of the material. Heavier atoms or molecules have more electrons, and stronger London forces.

Detailed explanation-5: -The short answer is that larger molecules have more e-, and are affected by LDF’s more than smaller molecules with less e-. With more electrons and more atoms for those electrons to be distributed over, there is a greater chance for frequent or large instantaneous dipoles, increasing the overall Van der Waals forces.