Question

A polar covalent bond forms when:
A. two polar atoms combine
B. two ions bond
C. the shared pair of protons more attracted to one atom on the other
D. the shared pair of electrons more attracted to one atom on the other
E. the transferred pair of electrons more attracted to one atom on the other

Answer 1

Hint: Every atom is composed of a nucleus and this nucleus is made up of protons and neutrons where protons is positively charged and neutrons are neutral in charge and electrons which are negatively charged are revolving around the nucleus.

Complete answer:
Covalent bond is the bond formed between hydrogen and chlorine that is formed between these two species because of their varying electronegativities which tend to become polarized. This happens because the more electronegative atom which is chlorine in this case pulls the bond pair of electrons closer to itself by developing a partially negative charge on it and positive charge on hydrogen.
The strength of a covalent bond is highly dependent on the electronegativities of the two bonded atoms or we can say that the difference between the electronegativities of the bonded atoms. Hence we can say that the polar covalent bond formed when the shared pair of electrons is more attracted to one atom on the other.

From the above discussion we can consider that option D is the correct answer.

Note:
A non-polar covalent bond is defined as a type of chemical bond which is formed when electrons are shared equally between two atoms. Thus in an atom the number of electrons shared by the adjacent atoms will be the same.