Question

A polar-covalent bond between two atoms is best described as

	A.	Equal sharing of electrons between the two atoms
	B.	No sharing of electrons between the two atoms
	C.	Unequal sharing of electrons between the two atoms
	D.	Unequal sharing of protons between the two atoms
	E.	One atom lost an electron completely and the other atom gain that electron completely

Answer 1

A polar covalent bond is the bond formed between two disimidiss atoms of different electronegativity.

When a covalent bond is formed between two atoms of different electronegativity, the more electronegative atom attracts the shared pair of electrons more towards itself and gets partial negative charge, whereas the other atom gets partial positive charge.

Due to this difference in electronegativity, the bonded electrons are unequally shared between them.

Example:

Let us consider HCl molecule, in which the electronegativity of Chlorine is more than Hydrogen, hence the bonded electrons tilt towards chlorine which gets partial negative charge and hydrogen gets partial positive charge.

Hence option (c) is correct.