Question

why is it important to know that matter is pure or not​

Answer 1

Explanation:

Chemistry is all around us. Chemical reactions are seen in plants and animals which results in the formation of substances and it can be used to treat disease. It is important to know the subject as it endow medicines which are very important in our day to day life. The course content in CBSE class 9 Chemistry, CBSE helps us to understand the properties of different substances and how these substances change.

Let’s involve in the efforts and understand the significance to develop new, eco-friendly materials or modify old ones to meet the changing needs with changes in the lifestyle of people.

Answer 2

A pure substance can never be separated by using ordinary physical methods used up as a result of this we need to find out whether a substance is pure or not.

Explanation:

• Pure substances are those substances which consists of the elements and compounds. The cannot be broken down by ordinary physical means by boiling or distillation.

• However the impure substances or mixture can be separated by physical means. Hence impure substance are easier to separate from each other. Also pure substances can only be broken down by the process of electrolysis

To know more about pure substances,

Which of the following is not a pure substance? a. Common salt b ...

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