Question

Which molecule contains a triple covalent bond? (1) H2 (3) O2 (2) N2 (4) Cl2

Answer 1

N2 because it has 5 valence atoms so it needs 3 to have 8, wich is the octet rule, so three is a triple covalent bond

Answer 2

Answer: The correct answer is Option 2.

Explanation:

Covalent bond is defined as the b which is formed by the sharing of electrons between the atoms forming a bond.

Non-polar covalent bond is defined as the bond which is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: $N_2,O_2$ etc..

For the given options:

• Option 1:  $H_2$

Hydrogen is the 1st element of the periodic table having electronic configuration $1s^1$

This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another hydrogen atom.

• Option 2:  $N_2$

Nitrogen is the 7th element of the periodic table having electronic configuration $1s^22s^22p^3$

This element needs 3 electrons to attain stable electronic configuration and will form triple covalent bond with another nitrogen atom.

• Option 3:  $O_2$

Oxygen is the 8th element of the periodic table having electronic configuration $1s^22s^22p^4$

This element needs 2 electrons to attain stable electronic configuration and will form double covalent bond with another oxygen atom.

• Option 4:  $Cl_2$

Chlorine is the 17th element of the periodic table having electronic configuration $1s^22s^22p^63s^23p^5$

This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another chlorine atom.

Hence, the correct answer is Option 2.