question_answer 1)

  The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting panicles but their magnitude depends upon : (a) charge of interacting particles                              (b) mass of interacting particles (c) polarisability of interacting particles                  (d) strength of permanent dipoles in the particles

Answer:

  (c) Molecules which are easily polarisable, develop instantaneous dipole.