Which of these molecules are polar? check all that apply. co2 so2 ch2cl2 pcl3?

Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge. For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound.

The following molecules are polar:
SO2- It is polar because it has dipole moment.
CH2Cl2
PCl3

SO2 and PCL3 are all polar. SO2 is polar because it is a non-linear molecule and is slightly more charged on each side. PCL3 is polar because because the dipoles don't completely cancel each other out.