Inter Surface chemistry
Class 12th chemistry Chapter – 5 VVI objective For Bihar Board and all other board In English medium
Surface Chemistry
1. If dispersed phase is liquid and dispersion medium is solid, the coloid is known as :
(A) A Sol
(B) A gel
(C) An emulsion
(D) A foam
Ans – B
2. fog is an example of coloidal solution of :
(A) Liquid dispersed in gas
(B) Gas disprased in gas gas
(C) Solid dispersed in gas
(D) Solid dispersed in liquid
Ans – A
3. Which of the following increases the rate of physi-adsorption ?
(A) Decrease in temperature
(B) Increase in temperature
(C) Decrease in pressure
(D) Decrease in surface area
Ans – A
4. What happen when a lyophilic solution is added to lyophobic solution ?
(A) Lyophobic solution is not protected
(B) Lyophilic solution is protected
(C) Film of lyophilic solution is formed over lyophobic solution
(D) Film of lyophobic solution is formed over lyophilic solution
Ans – C
5. The movement of Colloidal Particles under electric field is known as :
(A) Electrophoresis
(B) Dialysis
(C) Electro dialysis
(D) None of these
Ans – A
6. Which one of the following is lyophilic colloid ?
(A) Milk
(B) Gum
(C) Fog
(D) Liquid in gas
Ans – B
7. Which of the following colloidal system represents a gel ?
(A) Solid in liquid
(B) Solid in gas
(C) Liquid in solid
(D) Liquid in gas
Ans – C
8. Which of the following represents a multimolecular
colloidal particles
(A) Sol. of gold
(B) Cellulose
(C) Soaps
(D) Synthetic detergent
Ans – A
Surface chemistry vvi objective
9. Which of the following represents a marco molecular colloidal particles
(A) Sol. of gold
(B) Cellulose
(C) Soaps
(D) Synthetic detergents
Ans – B
10. which of the following represent an associated colloids ?
(A) Sol. of gold
(B) Starch
(C) Proteins
(D) Soaps
Ans – D
11. Which of the following does not represent more molecular colloidal particles ?
(A) Nylon
(B) Plastics
(C) Rubber
(D) Soaps
Ans – D
12. A Colloidal solution can be purified following the method of :
(A) Dialysis
(B) Peptization
(C) Mechanical dispersion
(D) Oxidation
Ans – A
13. Which of the following enzymes convent starchinto maltose ?
(A) Maltos
(B) Diastose
(C) Zymase
(D) Invertase
Ans – B
14. Which of the following enzymes convert maltose into glucose :
(A) Maltose
(B) Diastase
(C) Zymase
(D) Invertase
Ans – A
15. Chemisorption :
(A) involves the week attractive interaction between the adsorbent and adsorbate
(B) Is irreversible in nature
(C) Decreases with increase in temperature
(D) Involves multilayer adsorption
Ans – B
16. Which of the following is not correct ?
(A) The extent of adsorption depends on the nature of the absorbent and absorbate
(B) The extent of adsorption depends on the pressure of the gas
(C) The extent of adsorption depends on the temperature
(D) The extent of adsorption has no upper limit
Ans – D
Class 12th Surface chemistry
17. The activation energy is a chemical reaction is defined as :
(A) The difference in energies of reactants and products
(B) The sum of energies of reactants and products
(C) The difference in energy of intermediate complex with the average energy of reactants and products
(D) The difference in energy of intermediate complex and the average energy of reactant
18. The use of catalyst helps in :
(A) Increasing the rate of forward reaction only
(B) Increasing the rate of backward reaction only
(C) Increasing the rates of both forward and backward reactions
(D) Increasing the relative amount of products
Ans – C
19. The reaction is high molecularity are rare because :
(A) Many body collisions have a low probability
(B) Many body collisions are not favoured energetically
(C) Activation energy of many body collisions is very large
(D) Very high concentration is required for such reactions
Ans – A
20. The half-Life period of any first order reaction :
(A) Is half the specific rate constant
(B) Is always the same irrespective of the reaction
(C) Is independent of initial concentration
(D) In directly proportional to initial concentration of reactants
Ans – C
21. The dimensions of rate constant of 2nd order reaction involves :
(A) Concentration
(B) Concentration and time
(C) Time only
(D) Neither time nor concentration
Ans – B
Inter Surface chemistry
22. Collision theory is applicable to :
(A) First order reactions
(B) Zero order reactions
(C) Biomolecular reactions
(D) Intramolecular reactions
Ans – C
23. The cell emf depends on :
(A) Temperature
(B) The size of anode
(C) The size of cathode
(D) Volume of the electrolytic solution
Ans – A
24. Which of the following metals form a protective layer of oxide the prevent corrosion ?
(A) Cu
(B) Ag
(C) Au
(D) Al
Ans – D
25. Hydrogen-oxygen fuel cell are used in spacecrafts to supply
(A) Oxygen
(B) Hydrogen
(C) Water
(D) Illumination
Ans – C
26. The amount of electricity required to deposit 1 mol of aluminium from a solution of AlCl3 will be :
(A) 0.33 F
(B) 1 F
(C) 3 F
(D) 1 ampere
Ans – C
27. Faraday’s second law at electrolysis is related to :
(A) Atomic number of the cation
(B) Equivalent weight of the electrolyte
(C) Atomic number of the anion
(D) Speed of cation
Ans – B
Inter Surface chemistry
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