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 stabilization 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 :

A plane electromagnetic wave EZ = 100 cos (6 × 10⁸ t + 4x) V/m, where x is in metre and t is in second. propagates in medium, what is refractive index of the medium?

The process of settling of colloidal particles is known as

Which of the following is not a characteristic of physisorption of a gas on solid surface?

Emulsion is a collodial solution of 

The coagulating power of ions for haemoglobin decreases in the order