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CBSE - Class 9 Science Is Matter Around Us Pure Worksheet

Explain the following giving examples. (d) Suspension

Classify the following into elements, compounds and mixtures. (d) Silver

Which of the following are chemical changes? (b) Rusting of iron

Which of the following materials fall in the category of a “pure substance”? (e) Calcium oxide

Which separation techniques will you apply for the separation of the following? (f) Oil from water

Which of the following are chemical changes? (a) Growth of a plant

How would you confirm that a colourless liquid given to you is pure water?

Classify the following into elements, compounds and mixtures. (j) Soap

Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

(d) What is the effect of change of temperature on the solubility of a salt?

10.

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

11.

Explain the following giving examples. (a) Saturated solution

12.

Classify the following into elements, compounds and mixtures. (h) Coal

13.

Which separation techniques will you apply for the separation of the following? (a) Sodium chloride from its solution in water

14.

Explain the following giving examples. (b) Pure substance

15.

Classify the following into elements, compounds and mixtures. (m) Blood

16.

Which of the following materials fall in the category of a “pure substance”? (a) Ice

17.

Classify the following into elements, compounds and mixtures. (i) Air

18.

Which of the following will show “Tyndall effect”? (b) Milk

19.

Classify the following into elements, compounds and mixtures. (l) Carbon dioxide

20.

Which of the following are chemical changes? (f) Freezing of water

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