Arrange the following in order of increasing density

The mass per unit volume of a substance is called density. (Density = mass / volume) Arrange the following in order of increasing density

air, exhaust from chimneys, honey, water, chalk, cotton and iron.

Answer :- Air < Exhaust from chimneys < cotton < Water < Honey < Chalk < Iron

Explanation:

Air is the mixture of gases. Chimney exhaust is also a mixture of gases; along with some heavier particles, such as ash. This makes the density of chimney exhaust more than air.

Cotton is a porous solid and which has lot of air trapped within pores. This makes its volume more than water. Therefore, it is less dense than water.