Question

Correct the order of substances as per density.
a) air, honey, iron, water
b) iron, honey, air, water
c) iron, water, honey, air
d) air, water ,honey, iron​

Answer 1

Answer:

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: The increasing order of density is air < exhaust from chimney < cotton < water < honey < chalk < iron

Answer 2

The correct answer is option d) air, water, honey, iron

Whenever you need to arrange substances according to density, the first step is to group them together in terms of their state of matter. This is because solids are denser than liquids, and liquids are denser than gases, because of the space between their molecules.  

The next step is to arrange the solids, liquids and gases within each category.  

Here, clearly, air is in the gaseous form; so, it is the least dense. Next come the liquids- water and honey. Honey is denser than water. Finally comes iron, which is a solid.