Eamcet - Chemistry - Surface Chemistry Question And Answers

Which of the following is a lyophobic colloidal solution ?

A.  Aqueous starch solution

B.  Aqueous protein solution

C.  Gold sol

D.  Polymer solutions in some organic solvents

View Answer  

Which of the following biomolecules acts as specific catalysts in biological reaction

A.  Carbohydrates

B.  Lipids

C.  Vitamins

D.  Enzymes

View Answer  

The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively are :

A.  solid, solid, lyophobic

B.  liquid , liquid , lyophobic

C.  solid, liquid, lyophobic

D.  solid, liquid, lyophilic

View Answer  

If a solid is dispersed in a liquid the colloid is called

A.  Lyosol

B.  Emulsion

C.  Gel

D.  Acrosol

View Answer  

One atom of 3919K contains:

A.  19p;20n and 19e-

B.  19p;20n and 20e-

C.  20p;19n and 20e-

D.  20p;19n and 19e-

View Answer  

Gold number is used to show

A.  Protective power of lyophillic colloids

B.  Protective power of lyophobic colloid

C.  Peptisation power of a colloid

D.  Precipitation power of a colloid

View Answer  

In Freundlich adsorption isotherm, the intercept is equal to

A.  k

B.  log k

C.  1/n

D.  log x/m

View Answer  

The nature of forces operating between the adsorbate and the adsorbent in the adsorption occurring at high temperature is

A.  Vander waals forces

B.  Chemical forces

C.  Gravitational forces

D.  Fermi forces

View Answer  

Chemisorption involves

A.  Bi-layered

B.  zero layered

C.  Uni layered

D.  Multi layered

View Answer  

The gold numbers of three protective colloids A, B, and C are 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is:

A.  B, C, A

B.  A, B, C

C.  B, A, C

D.  C, A, B

View Answer  

The decomposition of H2O2 may be decreased by adding a small quantity of glycerol.This is an example of

A.  Neutralisation

B.  Negative catalysis

C.  Positive catalysis

D.  Catalytic poisoning

View Answer  

The gold numbers of three protective colloids A, B, and C are 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is

A.  B, C, A

B.  A, B, C

C.  B, A, C

D.  C, A, B

View Answer