Question

How to justify gases have intermolecular forces?

Answer 1

It occurs when the molecules of a gas are cooled to the point where they no longer possess sufficient kinetic energy to overcome intermolecular attractive forces. ... A large value of a in the Van Der Waals equation indicates the presence of relatively strong intermolecular attractive interactions.

Answer 2

Answer:

You have to find out which elements, acids, alkalis etc. are combined to form the gases. If both reactants are non - metallic, they will form a gas with a covalent bond. A covalent bond is the sharing of electrons between non-metallic atoms.