CH3Cl, or methyl chloride, is a polar molecule. It contains four polar, covalent bonds that are arranged around the carbon atom to give the molecule a net dipole moment.
Methyl chloride has a central carbon atom surrounded by three hydrogen atoms and one chlorine atom. The molecule has a tetrahedral shape. The hydrogen atoms are less electronegative than the carbon atom, so the electrons in the carbon-hydrogen bonds are unequally shared. They are present closer to the carbon atom, thus giving the hydrogen atoms a partial positive charge. Chlorine is more electronegative than carbon and attracts the bonded electron pair in the carbon-chlorine bond towards itself, thus obtaining a partial negative charge. The molecule is a dipole with a partial positive and a partial negative center, thus making methyl chloride a polar molecule.