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Is Matter Around Us Pure? — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure?2 Marks
MCQ
Which of the following will show Tyndall effect? Why?
  • A
    Salt solution.
  • ✓
    Starch solution.
  • C
    Milk.
  • D
    Copper sulphate solution.
✓

Answer

Correct option: B.
Starch solution.
Starch solution and milk will show Tyndall effect. This is because in a milk solution and starch solution $($colloidal solutions$)$ the size of solute particles is big enough to scatter the light passing through it.

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