Which one of the following is an emulsion?

Different colloidal particles of gold having different colours,obtained from different methods are due to:

Why do painters add oil to paint when painting a wall with oil paint?

The colloidal solution of mercury in water can be easily obtained by

Statement $I:$ For colloidal particles,the values of colligative properties are of small order as compared to values shown by true solutions at the same concentration.
Statement $II:$ For colloidal particles,the potential difference between the fixed layer and the diffused layer of opposite charges is called the electrokinetic potential or zeta potential.
In the light of the above statements,choose the correct answer from the options given below.

Under ambient conditions,which among the following surfactants will form micelles in aqueous solution at the lowest molar concentration?