Why is phosphorus trichloride polar?

Answer 1

PCl3 has a trigonal pyramidal molecular geometry, and is, therefore, polar because the dipoles do not cancel.

Answer 2

Phosphorus trichloride is polar because it has a trigonal pyramidal molecular geometry, with the chlorine atoms exerting a greater pull on the electron density towards themselves, resulting in an uneven distribution of charge within the molecule. This creates a separation of positive and negative charges, making it polar.