Surface Chemistry

Which of the following is a correct statements?

           (a) Brownian motion destabilizes sols

           (b) Any amount of dispersed phase can be added to emulsion without establishing it.

           (c) Mixing two oppositely charged sols in equal amount neutralizes charges and stabilizes colloids.

           (d) Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.

Given below are two statements : one is labeled as Assertion A  and the other is labeled as Reason R.

Assertion A: Finest gold is red in colour, as the size of the particles increase, it appears purple then blue and finally gold.

Reason R: The  colour of the colloidal solution depends on the wavelength of light scattered by the dispersed particles.

In the light of the above statements, choose the most appropriate answer from the options given below.

The nature of charge on resulting colloidal particles when FeCl₃ is added to excess of hot water is

Among the following the number of curves not in accordance with Freundlich adsorption isotherm is_________.

Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R

Assertion A: Thin layer chromatography is an adsorption chromatography.

Reason R: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.

In the light of the above statements, choose the correct answer from the options given below

Match the following:

The Zeta potential is related to which property of colloids

100 mL of 5% (w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg was poured into NaCl solution and stirred well. This resulted in a/an:

A sample of red ink (a colloidal suspension) is prepared by mixing eosine dye, egg white, $\mathrm{H}\mathrm{C}\mathrm{H}\mathrm{O}$  and water. The component which ensures stability of the ink sample is :

If the initial pressure of a gas is 0.03 atm, the mass of the gas adsorbed per gram of the adsorbent is____________* 10^-2g.