Question

In double covalent bond, there is sharing of :
A. $2$ electrons
B. $4$ electrons
C. $6$ electrons
D. $3$ electrons

Answer 1

Hint: When two pairs of electrons are shared between the atoms rather than just one pair, it is known as double covalent bond. We can understand double covalent bonds with examples. Two oxygen atoms in an oxygen molecule can achieve stable structure by sharing two pairs of electrons. Another example of double covalent bond is ethene molecule, in ethene there is a double covalent bond established between the two carbon atoms. Hence In double covalent bond , there is sharing of four electrons.

Step-By-Step solution:
We know that in a covalent bond, there is sharing of electrons between the two atoms which are connected by the bond. These electrons are known as shared pairs or bonding pairs. We can say that forces between the atoms when they share electrons are used to balance and stabilize the molecule. Double covalent bonds are stronger than single covalent bonds. Double bonds add stability to compounds and restrict any rotation around the bond axis. In double bonds, bond lengths are shorter than single bonds. Hence we know that when a double bond is formed between two atoms of a molecule there is sharing of four electrons. So option B is the correct answer to this problem.

Note: Now we conclude that double covalent bond is formed by sharing two pairs of electrons between the two atoms of a molecule. Double covalent bond is found in oxygen molecules where A double bond is established between two oxygen atoms and they share two pairs of electrons that is four electrons.