Q. 1

Which of the following will show “Tyndall effect”?
A. Salt solution

B. Sugar solution

C. Soap solution

D. Copper sulphate solution

Answer :

Tyndall effect is the phenomenon in which the path of the light beam becomes visible when a light beam enters a colloidal solution. The path becomes visible due to the scattering of light by the colloidal particles. Soap solution is an example of a colloidal solution and hence shows Tyndall effect. Salt solution, sugar solution and copper sulphate are examples of true solutions and do not show Tyndall effect.

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