Is Matter Around Us Pure — Science STD 9 — Question
Gujarat BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure1 Mark
MCQ
The substance which gives colloidal solution in water is:
A
Sugar
✓
Soap
C
Alum
D
Plaster of paris
✓
Answer
Correct option: B.
Soap
A colloidal solution is a solution in which a material is evenly suspended in a liquid.
Classification of colloids depends on the dispersed phase and the dispersion medium.
The various types are sol, emulsion, foam and aerosol.
Soap is a type of foam in which the dispersion medium is a liquid and the dispersed phase is a gas.
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