Question

what type of intermolecular forces is/are present in so3? london dispersion forces only dipole - dipole forces only london dispersion forces and dipole - dipole forces dipole - dipole and hydrogen bonding dipole - dipole, hydrogen bonding and london dispersion forces ionic ionic and london dispersion forces

Explanation:

London dispersion forces exist between all molecules. Sulfur trioxide ($SO_3$) is a non - polar molecule due to its symmetrical trigonal planar geometry, so it has no permanent dipole - dipole forces. Also, there is no hydrogen bonding as there is no hydrogen atom bonded to a highly electronegative atom like N, O, or F. Thus, only London dispersion forces are present.

Answer:

London Dispersion Forces only