Question

Arrange the following in the correct order of increasing density.

• A. Air
• B. Oil
• C. Water
• D. Brick

Answer 1

Density is a measure of the amount of substance (mass) present per unit volume.

$\bullet$ Particles in the solids are closely packed. They have very less or no space between them. So, the amount of substance packed in a unit volume is high. Thus, they have a high density.

$\bullet$ Particles in the liquids have more space between them as compared to solids. Thus, they are less dense.

$\bullet$ Particles of gases have large space between them. So, they have very low density.

Hence, the correct increasing order of density would be-
Air < Oil < Water < Brick