Page 64 - ICSE Chemistry 8

3. Chalk in water is an example of emulsion. ____________________
4. Nichrome is an alloy of iron and carbon. ____________________

5. A mixture of common salt and potassium nitrate can be separated
by solvent extrac on. ____________________
6. We can separate bu er from milk by fi ltra on. ____________________

E. Write two uses of the following separa on techniques.

Separa on technique Uses
1. Sieving • ___________________________________________________

• ___________________________________________________

2. Magne c separa on • ___________________________________________________
• ___________________________________________________

3. Filtra on • ___________________________________________________

• ___________________________________________________

4. Evapora on • ___________________________________________________
• ___________________________________________________

5. Centrifuga on • ___________________________________________________
• ___________________________________________________

6. Frac onal dis lla on • ___________________________________________________

• ___________________________________________________

SHORT AND PRECISE

A. Show the given text in the form of fl owcharts.
1. Classifi ca on of ma er

2. Types of separa on techniques
3. Types of mixtures

B. Give reasons for the following statements.
1. A mixture has no defi nite composi on.

2. The cons tuents of a mixture can be separated by simple physical methods.
3. A few iron nails sunk in the sand can be separated using a magnet.
4. We can separate a mixture of sand and water by sedimenta on and decanta on.

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