GENERAL KNOWLEDGE

Detailed explanation-1: -Dipole-Dipole and London (Dispersion) Forces are present in $ CH 3F $ .

Detailed explanation-2: -Dipole–dipole interactions are a type of intermolecular attraction-attractions between two molecules. Dipole-dipole interactions are electrostatic interactions between the permanent dipoles of different molecules. These interactions align the molecules to increase the attraction.

Detailed explanation-3: -In NF3, nitrogen has a lone pair around it and the presence of this lone pair makes it an asymmetrical molecule. An asymmetrical molecule has unbalanced charges and this makes it a polar molecule. So, in polar molecules, the intermolecular forces present are dipole-dipole, such as in NF3.