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Is Matter Around Us Pure — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure1 Mark
MCQ
The substance which gives colloidal solution in water is:
  • A
    Sugar
  • B
    Soap
  • C
    Alum
  • D
    Plaster of paris
✓

Answer

  1. Soap

Explanation:

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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