- Hydrogen bond is formed between molecules in which hydrogen atom is attached to an atom of an element with large electronegativity and very small size (F,O,N). Because of hydrogen bond the molecules associate themselves and hence possess higher B.P’s and M.P’s.
- The hydrogen bond formed between two molecules is called intermolecular hydrogen bond.
- The hydrogen bond formed between different groups of the same molecule is called intramolecular hydrogen bond.