Which molecule has polar bonding and is nonpolar?
1) h2o

2) bf3

3) nh3

4) ncl3

5)ch2cl2

Explanation:

A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms. It is also defined as the bond which is formed due to the unequal sharing of electrons between the atoms.

If a molecule with polar covalent bonds is symmetrical in nature, it cancels out the dipole moments and thus the molecule becomes non polar. Example:

If a molecule with polar covalent bonds is asymmetrical in nature, dipole moments do not cancel and thus the molecule remains polar. Ex:, , and

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.