00:01
High, polar molecules occur when two atoms do not share electrons equally in a covalent bond.
00:07
As a result, suppose we have two atoms.
00:11
A is more electronegative.
00:14
That means it is pulling more electrons of this bond towards itself.
00:20
Due to this reason, a develops a partial negative charge and b develops a partial positive charge.
00:28
This is the formation of a dipole.
00:31
This happens when there is a difference between the electronegativity values of each atom.
00:36
If two atoms are of the same electronegativity, then the bond and the electrons are equally shared between these two and hence a non -polar bond is formed.
00:47
Therefore such molecules are non -polar and such molecules are polar molecules.
00:54
And sometimes in a molecule some bonds are polar and some bonds are non -polar.
00:59
Till as a result the entire molecule exists as a non -polar molecule.
01:05
In such a case, we first find the shape of that molecule and we find the polarity of each bond.
01:15
If the net sum of the polarity of all the bonds is zero, then such molecules are non -polar and if that is not zero, then such molecules are polar molecules.
01:27
Let's understand it by the molecules given.
01:33
So this is ch4...