Matter Around Us Book back questions | Unit 10 | Class 9 | | Science

by michaelg September 20, 2021

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00:00 Introduction
00:13 Choose the correct answer
03:44 True or false
05:21 Match the following
05:47 Fill in the blanks

Questions answered in this video –

1. The separation of denser particles from lighter particles done by rotation at high speed is called _____________

2. Among the following ___________ is a mixture

3. When we mix a drop of ink in water we get a ________________

4. ________________ is essential to perform separation by solvent extraction method

5. __________ has the same properties throughout the sample

6. Oil and water are immiscible in each other.

7. A compound cannot be broken into simpler substances chemically.

8. Liquid – liquid colloids are called gels

9. Buttermilk is an example of heterogeneous mixture

10. Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.

11. Element

12. Compound

13. Colloid

14. Suspension

15. Mixture

16. A ________________ mixture has no distinguishable boundary between its components.

17. An example of a substance that sublimes is ________________

18. Alcohol can be separated from water by _________________

19. In petroleum refining, the method of separation used is ______________

20. Chromatography is based on the principle of ______________