Introduction

We come across and consume a lot of things daily like milk, butter, salt, water, juice, etc. How do we judge that all these things are pure?

For a common man pure means having no adulteration. But, for a scientist, pure means that it contains only one type of matter or particle.

All the matter around us can be pure or impure. The matter around us is of two types: pure substances and mixtures.

All the matter around us is not pure, in fact, matter around us is of two types: 

To score More in your class 9 refer NCERT solutions for class 9