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.
The order of densities is as follows
Iron > Chalk > Honey > Water > Exhaust from chimneys > Air
Explanation: We know that,
Particles in solids are packed tightly
Particles in liquids are packed with some space between them
Particles in gases have more space between them.
So in a fixed volume, the number of particles would be greatest in solids, followed by liquids and then gases.
Density of solid > Density of liquid > Density of gas.
Further, the arrangement of particles in different solids, liquids and gases are also different.