question_answer

Consider the following statements.

I. The colour of the hydrophobic sol depends on the wavelength of the light scattered by the dispersed particle.

II. The smaller the gold number value of a hydrophilic colloid, the greater is its protective power.

III. The movement of sol particle under an applied electric potential is called electro osmosis.

Which of the above statements are correct?

A)  I and II                                

B)  I and III               

C)         II and III              

D)         I, II and III