Question

The molecule containing a triple covalent bond is:
a.) Ammonia
b.) Methane
c.) Water
d.) Nitrogen

Answer 1

Hint: A covalent bond is also called a molecular bond. It is a type of chemical bond that involves the sharing of electron pairs between two different atoms or two same atoms. There are three types of covalent bonds. First one is single covalent bond or sigma bond, second one is double bond (one sigma bond and one pi-bond) and third one is triple bond (one sigma bond, two pi-bonds).

Complete step by step answer:
Coming to given options, option A, the structure of ammonia (\[N{{H}_{3}}\]) is a pyramid and it contains three sigma bonds (three single covalent bonds).
Coming to option B, the structure of methane (\[C{{H}_{4}}\]) is tetrahedral and it contains four sigma bonds (four single covalent bonds).
Coming to option C, the structure of water (\[{{H}_{2}}O\]) is angular and it contains two sigma bonds (two single covalent bonds).
Coming to option D, the structure of nitrogen (\[{{N}_{2}}\]) is linear and it contains a triple bond (one sigma bond, two pi-bonds).
Therefore triple bonds are present in nitrogen molecules.
So, the correct answer is “Option D”.

Note:Don’t be confused with sigma bond and pi-bond.
Sigma bonds (σ bond) is the strongest covalent chemical bond. It is formed by head-on overlapping between atomic orbitals of atoms.
Pi bond (π bond) is a covalent chemical bond weaker than sigma bond. It is formed by lateral overlap of atomic orbitals of atoms.
The pi-bond is also called an unsaturated bond. If any molecule contains pi-bond then they are called as unsaturated molecules.