Page 90 - Viva ICSE Science 4 : E-book

TERMS TO KNOW

1. Solution: A type of liquid mixture in which two or more substances are mixed evenly

2. Solute: Substance that gets dissolved
3. Solvent: Substance in which the solute gets dissolved
4. Solubility: The ability of a substance to dissolve
5. Insoluble: Not able to dissolve
6. Sedimentation: Process of settling down at the bottom

7. Decantation: Drawing out the clear portion from top of the solution after sedimentation
8. Filtration: Separation of two substances by passing a solution through a fi lter paper
9. Evaporation: Process of heating a liquid which turns it into vapour or gas

QUICK LOOK

1. A type of mixture formed as a result of mixing of two substances is called solution.
2. The substance that dissolves is called solute and the substance in which the solute
dissolves is called solvent.
3. The substances that dissolve completely are called soluble substances. The substances
which do not dissolve are called insoluble substances.

4. Sedimentation, decantation and fi ltration methods can separate insoluble substances.
5. Evaporation method is used to separate soluble substances.

EXERCISES

A. Fill in the blanks.
1. ____________ and ____________ are the two components of solution.

2. ____________ is called a universal solvent.
3. The quantity of ____________ is always more than ____________ in a solution.

4. Carbonated drink shows the solubility of ____________ in water.
5. Soluble substances can be separated by ____________ method.

6. ____________ method is performed using fi lter paper or a fi ne muslin cloth.

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