Question

Which of the following shows the correct order of increasing density?

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

Answer 1

The correct option is A Air < Oil < Brick

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 (gas) < Oil (liquid) < Brick (solid)