Chapter 2: Is Matter Around Us Pure?- Exercise- 1

Science

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Chapter 2: Is Matter Around Us Pure?

Class: IX

Exercise 1

Question 1:

What is meant by a pure substance?

Answer 1:

Pure substances are defined as substances that are made of a single type of particles and it can be classified as elements or compounds.

Question 2:

List the points of differences between homogeneous and heterogeneous mixtures.

Answer 2:

A mixture that has uniform composition throughout is called as homogeneous mixture.

For example: sugar solution, salt in water, copper

A mixture that has non-uniform composition throughout is called as heterogeneous mixture.

For example: sodium chloride and iron fillings, oil and water, salt and sulphur