Question

which of the following will show Tyndall effect.
a. salt solution
b. milk
c. copper sulphate solution
d. starch solution​

Answer 1

Tyndall effect is shown by those mixtures which are colloids. This is because colloids have suspension of small particles, from 1 – 1000 nanometres in size which can scatter light falling on them, a phenomenon called as Tyndall effect.


In the above question, only b) milk and d) starch solution show Tyndall effect as they are colloids. a) salt solution and c) copper sulphate solution are solutions and therefore don’t show Tyndall effect.

Answer 2

Answer. (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.