Which of the following is applicable to a thin film?

Explain Electrophoresis.

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:

Jelly is a colloidal solution of

From the following,which are colloids?
$(i)$ $NaCl(aq.)$
$(ii)$ Fog
$(iii)$ Paint
$(iv)$ Aerosols
$(v)$ Mud
$(vi)$ Blood

Which of the following does not show Tyndall effect?