more tha n one option correct. which of the following are true: (1) Van der waals forces are responsible for formation of molecular crystals (2) branching lowers boiling points of isomeric organic compounds due to vander waals forces of attraction (3)In graphite van der waals forces act between the carbon layers (4)In diamond van derwaal forces act between the carbon layers.
plz tell me the reason of which ever option is correct.and also examples.