Question

_______ state of matter has the least density.

• A. Solid
• B. Liquid
• C. Gas
• D. None of these

Answer 1

The correct option is C

Gas

1. Density gives an idea of how closely the atoms are packed in the matter.
2. The closer the atoms, the more the density of the matter and vice versa.
3. $Density=\frac{mass}{volume}$
4. Density is inversely proportional to volume which implies that with an increase in the volume, the density decreases and vice versa.
5. For a given mass, the volume occupied by gas > volume occupied by liquid > volume occupied by solid and hence density is least for gases.
6. In gases, the atoms are very far from each other as compared to liquids or solids and hence, the density of gases is lesser than in liquids and solids.

Hence, option (C) is correct.