Q31 of 252 Page 80

Which of the following will show Tyndall effect? Why?

(a) Salt solution (b) Starch solution


(b) Milk (d) Copper sulphate solution

(b) Milk will show tyndall effect, it scatters a beam of light passing through it and renders its path visible as it is a colloid. The scattering of light by colloidal particles is called tyndall effect.


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29

How will you differentiate between a suspension and a colloid?

 30

You have been given a suspension and a solution. How could you tell the difference between them by their appearance?

 32

Name the different types of solutions. Give one example of each.

 33

Classify the following into solution, suspensions and colloids:

Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.