Question

Arrange the following in ascending order of their atomicity:
Oxygen, Sulphuric acid and Ammonium chloride.

• A. Sulphuric acid, Ammonium Chloride, Oxygen.
• B. Oxygen, Sulphuric acid, Ammonium Chloride.
• C. Oxygen, Ammonium Chloride, Sulphuric acid.
• D. None of these

Answer 1

The correct option is C

Oxygen, Ammonium Chloride, Sulphuric acid.

Atomicity is the total number of atoms present in the molecule.

• Oxygen molecule (${\text{O}}_2$) has 2 oxygen atoms. So, its atomicity is 2.
• Sulphuric acid (${\text{H}}_2{\text{SO}}_4$) has 2 hydrogen, 1 sulphur and 4 oxygen atoms. So, its atomicity is 7.
• Ammonium chloride (${\text{NH}}_4\text{Cl}$) has 1 nitrogen atom, 4 hydrogen atom and 1 chlorine atom. So, its atomicity is 6.

So, the order of atomicity is Oxygen < Ammonium Chloride < Sulphuric acid.