Page 66 - ICSE Chemistry 8

C. Answer in detail.
1. Write the characteris cs of a mixture.

2. Discuss the forma on of mixtures.
3. With the help of an ac vity, discuss the separa on of components of a mixture by sieving.

4. With the help of an ac vity, discuss how to separate the components of a mixture by winnowing.
5. Explain the process of frac onal crystallisa on.

6. How is evapora on diff erent from sublima on?

7. Explain the process of froth fl oata on.
8. What is centrifuga on?

9. Write a note on frac onal dis lla on. With the help of an ac vity, explain how the components of a
mixture of CaCO and NaCl can be separated.
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10. What is chromatography? What is paper chromatography? Write the advantages of chromatography.

OBSERVE AND PERFORM

A. Observe the given image carefully and answer the following
ques ons.

1. Label the image shown.

2. Name the technique of separa on shown in the image.

3. Which is the principle of the separa on technique?

4. Why is this separa on technique used?

B. Observe the given image carefully and answer the
following ques ons.

1. Label the image shown.
2. Name the technique of separa on shown in
the image.

3. Which is the principle of the separa on
technique?

4. Discuss how separa on of components of a
mixture takes place in this technique.
5. Describe the apparatus used in the separa on
technique.

6. Why is this separa on technique used?

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