Four students A,B,C and D are asked to prepare colloidal solution .The following diagrams shown the preparation done by them .Name the student who will able to prepare colloidal solution.Write two properties of colloidal solutions.

Explanation

Only student 'A' has prepared th ecolloidal soluton Egg as such does not mix with water .Only white of an egg forms colloidal solution on stirring in water .Both sugar and common salt form true solution in water .The two properties of colloidal solution are:
(i) Colloidal solution ar of hetergenous nature consisting of disperesed phase and dispersion medium
(ii) Collloidal solution show Tydall effect