and Foam
0. Which of the following will show "Tyndall
effect'?
(a) A solution of common salt in water
(b) Ink
(c) A solution of starch in water
(d) A solution of nitre in water
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In this (b) milk and (d) starch solution show Tyndall effect because they are colloidal solution. Whereas (a) salt solution and (c) copper sulphate solution are true solution. Their particle size is too small to scatter light. So they do not show Tyndall effect.
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