Surface Chemist...

Oil soluble dye is mixed with water in oil emulsion, then:

One gram of charcoal adsorbs $$400$$ mL of $$0.5\ M$$ acetic acid to form a monolayer, and the molarity of acetic acid reduces to $$0.49\ M$$. Calculate the surface area of charcoal adsorbed by each molecule of acetic acid, where the surface area of charcoal is $$3.01\times 10^{2}$$ m$$^{2}$$ g$$^{-1}$$.

Preparation of Lyophobic sols by chemical method involves :

A soap $$(C_{17}H_{35} COONa)$$ solution becomes a colloidal sol at a concentration of $$1.2\times 10^{3} M$$. On the average, $$2.4\times 10^{13}$$ colloidal particles are present in $$1 mm^3$$. What is the average number of stearate ions (in multiples of $$10^6$$) in one colloidal particle (micelle)?

Which of the following are cation exchange resin and anion exchange resins?

Match the List I with List II and choose the correct option from the codes given below:

A student takes about 4 ml of distilled water in four test tubes marked $$P, Q, R$$ and $$S$$. He then dissolves in each test tube, an equal amount of various salts, viz. sodium sulphate in $$P$$, potassium sulphate in $$Q$$, calcium sulphate in $$R$$ and magnesium sulphate in $$S$$. After that, he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tube marked:

Pick out the statement which is not relevant in the discussion of colloids:

Foam is formed when_______

A physical adsorption at low temperature may pass into chemisorption as: