Polar molecules are the molecules :
(1) having zero dipole moment.
(2) having permanent electric dipole moment.
(3) acquire a dipole moment only when magnetic field is absent.
(4) acquire a dipole moment only in the presence of electric field due to displacement of charges.
(1) having zero dipole moment.
(2) having permanent electric dipole moment.
(3) acquire a dipole moment only when magnetic field is absent.
(4) acquire a dipole moment only in the presence of electric field due to displacement of charges.