Question

How can I determine bond polarity?

Answer 1

Hint: Bond polarity depends on the electronegativity difference between the two atoms involved and only on that difference, we can categorize the bond as polar, non-polar or ionic. Now you can easily answer the statement.

Complete answer:
First of let’s discuss what bond polarity is. By the term bond polarity, we mean the separation of the charges i.e. the positive and the negative charges along the chemical bond. And the separation of positive and the negative charges results in the formation of the electric dipole or simply we can say the dipole moment.
The electrons in a chemical bond are not equally shared by the two atoms involved. The atom which is more electronegative pulls the electrons towards itself and acquires partial negative charge and the less electropositive atom acquires the partial positive charge.
Now, on the basis of the bond polarity, bonds are of two types:- polar bonds and nonpolar bonds.
When the difference of the electronegativity between the atoms lies in the range $1.7-2$, then the bond is said to be polar in nature.
On the contrary, when the difference of the electronegativity between the atoms $<0.5$, then the bond is said to be polar in nature.

Note: Both the polar and nonpolar bonds come under the category of the covalent bonds. But if the electronegativity difference between the atoms is more than 2, then in that case the bonds are said to be ionic in nature.