$A$ liquid scatters light and leaves no residue when passed through filter paper. This liquid can be described as..........

Hydrophilic sols are .......

Why is gelatin mixed in ice-cream?

Which of the following colloids cannot be easily coagulated?

Given below are two statements:
Statement $I :$ Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.
Statement $II :$ For stabilisation of an emulsion,excess of electrolyte is added.
In the light of the above statements,choose the most appropriate answer from the options given below:

Colloidal solutions can be purified by