Question

Covalent bonded are seen to have strong bonds within the next molecule, but intermolecular forces are small. Why?

Answer 1

It means that in a single molecule of compound the atoms are strongly bonded or connected whereas when two molecules are joined, the intermolecular force is small and the molecules can easily be separated to change their physical form ( solid, liquid or gaseous ) For eg. CH4.
In CH4 molecule the hydrogen and carbon atoms are strongly bonded but when 2 molecules of CH4 are joined to form 2CH4, the molecules are loosely connected and thus, they can easily be separated into two individual molecules of CH4