What electronegative atom do we often associate with polarity? For example, its presence can sometimes increase the polarity of a compound, but its placement in the molecule is also important.
Two polar molecules can make hydrogen bond which was found in many polar molecules. One example of hydrogen bond would be in the water. Water is a polar molecule with a positive end at the hydrogen side. Hydrogen bond in water is formed by molecule to molecule bond that looks like tetrahedral.
