Question

Non-Polar covalent bond exists between atoms of:
A.Metal and a Nonmetal.
B.Different elements whose electronegativity difference is high.
C.Different elements whose electronegativity difference is less.
D.Different elements.

Answer 1

We know that in order to solve this question, we must first understand some basic concepts about polarity and Covalent bonds. Then we need to assess the concept of Polar Covalent bond. The polarity of a covalent bond can be explained by a physical quantity called Dipole moment.

Complete answer:
A nonpolar bond is a type of chemical bond. It can be said that it is the line between the formation of a pure chemical bond and an electrovalent bond. However, if we would like to define it more accurately, a polar chemical bond is a bond that exists between two atoms consisting of electrons that are unevenly distributed. Polar Covalent bond: Basically, a polar bond is a certain class of a covalent bond. A polar covalent bond is a bond that exists between two atoms consisting of electrons that are unevenly distributed. Due to this state, the molecules tend to have some electrical dipole moment wherein the two ends are either slightly positive or negative. Electronegativity is the tendency of an atom to attract a shared pair of an electron towards itself. It has no units, it is a tendency. The covalent bond formed between two atoms in molecules whose electronegative difference exists is known as a polar covalent bond.
Non Polar covalent Bond exists between atoms of Different elements whose electronegativity difference is less. When a covalent bond is formed between two atoms of the same element, the shared electron pair will lie exactly midway between the two atoms i.e. the electrons are equally shared by the atoms. The resulting molecule will be electrically symmetrical i.eThe center of the negative charge coincides with the center of the positive charge. This type of covalent bond is described as a nonpolar covalent bond. The bonds in the molecules ${{H}_{2}}{{O}_{2}},\text{ }{{O}_{2}},C{{l}_{2}}$ etc., are non-polar covalent bonds.
Therefore, the correct answer is option C.

Note:
Remember that the electronegativity plays a significant role in determining the different types of covalent bonds. Electronegativity is the tendency of an atom to draw in a shared pair of electrons towards itself. It has no units. The chemical bond formed between two atoms in molecules.