Surface Chemistry(General Knowledge > General Science ) Questions and Answers

Question 1. Adsorption is a
  1.    Exothermic process
  2.    Endothermic process
  3.    Both
  4.    None
Explanation:-
Answer: Option A. -> Exothermic process
Question 2. In
  1.    Homogeneous 
  2.    Heterogeneous
  3.    Both
  4.    None
Explanation:-
Answer: Option B. -> Heterogeneous
Question 3. Rough surface of an adsorbent has
  1.    More porus
  2.    Non porus
  3.    More active centres
  4.    Less active centres
Explanation:-
Answer: Option C. -> More active centres
Question 4. When the concentration of adsorbate is more on the surface than the bulk of the adsorbent it is called as
  1.    Positive adsorption
  2.    Negative adsorption
  3.    Positive absorption
  4.    Negative absorption
Explanation:-
Answer: Option A. -> Positive adsorption
Question 5. Surface compound formation takes place in
  1.    Physical adsorption
  2.    Desorption
  3.    Chemical adsorption
  4.    Sorption
Explanation:-
Answer: Option C. -> Chemical adsorption
Question 6. It is a process of removing a dissolved substance from a colloidal solution by means of diffusion through a suitable membrane
  1.    Electrophoresis
  2.    Dialysis
  3.    Precipitation
  4.    Peptization
Explanation:-
Answer: Option B. -> Dialysis
Question 7. Which can be used as an adsorbent for removal of moisture and controlling humidity in room?
  1.    Silicon
  2.    Clay
  3.    Silica
  4.    Ceramic
Explanation:-
Answer: Option C. -> Silica
Question 8. Absorption is a
  1.    Bulk phenomena
  2.    Surface phenomena
  3.    Both
  4.    None of these
Explanation:-
Answer: Option A. -> Bulk phenomena
Question 9. The difference in potential of fixed and mobile layer is called
  1.    Zeta Potential
  2.    Colloidal potential
  3.    Electrostatic potential
  4.    All of above
Explanation:-
Answer: Option A. -> Zeta Potential
Question 10. In gas masks which substance is used to absorb toxic gases and vapours?
  1.    Coal powder
  2.    Animal charcoal
  3.    Wood charcoal
  4.    Activated charcoal
Explanation:-
Answer: Option D. -> Activated charcoal
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