MCQ on Surface Chemistry. We covered all the MCQ on Surface Chemistry in this post for free so that you can practice well for the exam.
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MCQ on Surface Chemistry for NEET Students
Which of the following is CORRECT for physisorption as well as chemisorption?
(A) Both are highly specific in nature.
(B) Both depend on the surface area of the adsorbent.
(C) Both are irreversible in nature.
(D) Both are favored by low temperatures.
Option b – Both depend on the surface area of the adsorbent.
Which of the following statements is/are CORRECT? i. On application of an electric field, the particles of the colloidal solution may move in both directions or not move at all. ii. The surface tension of lyophobic sol is similar to that of the dispersion medium. iii. Lyophobic sol can be easily coagulated by the addition of an electrolyte.
(A) Only iii
(B) Only i and iii
(C) Only ii and iii
(D) Only i and ii
Option c – Only ii and iii
In addition to a few drops of FeCl3 to freshly precipitated ferric hydroxide, a red-colored colloidal solution is obtained. This phenomenon is known as ………
(A) peptization
(B) dialysis
(C) electrical disintegration
(D) coagulation
Option a – peptization
Statement (1): The human body temperature is suitable for enzyme-catalyzed reactions. Statement (2): The optimum temperature range for enzymatic activity is 298-310 K. Select the most appropriate option.
(A) Both statements are correct.
(B) Both statements are incorrect.
(C) Statement (1) is correct but statement (2) is incorrect.
(D) Statement (1) is incorrect but statement (2) is correct.
Option a – Both statements are correct.
When AgNO3 solution is added to an excess of a dilute solution of Nal, there is the formation of ……..
(A) negatively charged Agl sol due to the adsorption of I
(B) negatively charged Agl sol due to the adsorption of NO3
(C) positively charged Agl sol due to the adsorption of Ag
(D) positively charged Agl sol due to the adsorption of Na
Option a – negatively charged Agl sol due to the adsorption of I
A substance ‘X’ behaves as a normal strong electrolyte at low concentrations but shows colloidal behavior at higher concentrations due to the formation of aggregates. Which among the following is most likely to be the substance X?
(A) Cellulose
(B) Sulphur
(C) Sodium stearate
(D) Polystyrene
Option c – Sodium stearate
Whipped cream is an example of dispersion of ……..
(A) solid in gas
(B) gas in liquid
(C) gas in gas
(D) liquid in gas
Option b – gas in liquid
Statement (1): Alum is used in the purification of drinking water. Statement (2): Alum coagulates the suspended impurities present in water. Select the most appropriate option.
(A) Both statements are correct.
(B) Both statements are incorrect.
(C) Statement (1) is correct but statement (2) is incorrect.
(D) Statement (1) is incorrect but statement (2) is correct.
Option a – Both statements are correct.
The enzyme urease catalyzes the decomposition of urea in presence of water into ………..
(A) ammonia and hydrogen
(B) nitrogen and carbon dioxide
(C) ammonia and carbon dioxide
(D) ammonium hydroxide and carbon monoxide
Option c – ammonia and carbon dioxide
Soap micelles formed in water contain ……….
(A) the polar outer surface and non-polar inner core
(B) the polar inner core and non-polar outer surface
(C) the polar inner core and polar outer surface
(D) the non-polar inner core and non-polar outer surface
Option a – the polar outer surface and non-polar inner core
Which of the following is associated with the ultrafiltration technique employed for the purification of colloidal solutions?
(A) Collodion solution
(B) Dialyser
(C) Centrifuge tube
(D) Membrane made of animal bladder
Option a – Collodion solution
The extent of adsorption of a gas on solid depends on …….. i. nature of the gas ii. the pressure of the gas iii. the temperature of the gas iv. nature of the adsorbent
(A) only i and ii
(B) only i, ii, and iv
(C) only i, ii, and iii
(D) all of these
Option d – all of these
The colloidal system in which the dispersed phase and dispersion medium both are liquid is known as ……..
(A) gel
(B) aerosol
(C) emulsion
(D) foam
Option c – emulsion
Which of the following statements is CORRECT? (I) When an animal hide is soaked in tannin, mutual coagulation occurs resulting in the hardening of leather. (II) Rubber is obtained by coagulation of latex, which is a colloidal solution of rubber particles. (III) The styptic action of alum is due to the coagulation of blood forming a clot, which prevents further bleeding.
(A) (I) and (II)
(B) (II) and (III)
(C) (I) and (III)
(D) (I), (II) and (III)
Option d – (I), (II) and (III)
The following statements are CORRECT, EXCEPT :
(A) Adsorption is accompanied by a decrease in entropy as well as a decrease in the enthalpy of the system.
(B) In adsorption, the concentration of the adsorbate is uniform throughout the bulk of the adsorbent.
(C) Solids, in finely divided states, act as good adsorbents.
(D) Adsorption is essentially a surface phenomenon.
Option b – In adsorption, the concentration of the adsorbate is uniform throughout the bulk of the adsorbent.
Which of the following is CORRECT?
(A) Cloud is an example of sol and froth is an example of foam.
(B) Cloud is an example of aerosol and froth is an example of foam.
(C) Cloud is an example of aerosol and froth is an example of an emulsion.
(D) Cloud is an example of solid sol and froth is an example of aerosol.
Option b – Cloud is an example of aerosol and froth is an example of foam
Micelles are ……….
(A) multimolecular colloids
(B) associated colloids
(C) macromolecular colloids
(D) emulsions
Option b – associated colloids
The method used to remove charged impurities from colloids is ……….
(A) filtration
(B) peptization
(C) centrifugation
(D) electrodialysis
Option d – electrodialysis
Animal charcoal is added to a solution of an organic dye. Then, the solution is well-shaken and filtered. The filtrate obtained is colorless. This is because ………
(A) the molecules of the dye are adsorbed by the charcoal
(B) the molecules of the dye are absorbed by the charcoal the molecules of the dye combine
(C) together with associated colloids
(D) the molecules of the dye react with the charcoal to form colorless compounds
Option a – the molecules of the dye are adsorbed by the charcoal
In an electrophoresis experiment, the colloidal particles moved toward the negatively charged electrode. Which of the following sol will show such a movement of colloidal particles?
(A) TiO₂ sol
(B) CdS sol
(C) Congo red sol
(D) Sb₂S3 sol
Option a – TiO₂ sol
In how many of the following, the physical state of the dispersed phase is liquid? Paint, Hair cream, Mist, Foam rubber, Soap lather, Gemstones, Cell fluids
(A) 1
(B) 2
(C) 3
(D) 4
Option b – 2
In pumice stone, the dispersion medium is a ……… and the dispersed phase is a ……….
(A) gas; liquid
(C) solid; liquid
(D) solid; gas
Option d – solid; gas
Which of the following is the most effective electrolyte to bring about the coagulation of a positively charged sol?
(A) Magnesium chloride
(B) Magnesium bromide
(C) Magnesium nitrate
(D) Magnesium carbonate
Option d – Magnesium carbonate
The destruction of emulsions can be possible by all, EXCEPT by ………
(A) the addition of an emulsifier
(B) freezing
(C) centrifugation
(D) heating
Option a – the addition of an emulsifier
Identify the INCORRECT statement.
(A) Lyophobic sols need stabilizing agents for their preservation.
(B) Lyophilic sols have the unique property of protecting lyophobic sols.
(C) Lyophilic sols are more stable than lyophobic sols.
(D) Lyophobic sols can be prepared easily by mixing the dispersed phase with the dispersion medium.
Option d – Lyophobic sols can be prepared easily by mixing the dispersed phase with the dispersion medium.
Argyrol is a/an ……… sol used as an eye lotion.
(A) gold
(B) Silver
(C) sulphur
(D) antimony
Option b – Silver
ZSM-5 catalyst converts ……….
(A) alcohols to petrol
(B) alkenes to alkanes
(C) alkanes to alcohols
(D) alkanes to alkenes
Option a – alcohols to petrol
Which of the following reactions does NOT represent heterogeneous catalysis?
(A) Hydrogenation of vegetable oil in the presence of nickel.
(B) Manufacture of ammonia by Haber’s process. in the
(C) Hydrolysis of methyl acetate presence of hydrochloric acid.
(D) Oxidation of sulphur dioxide into sulphur trioxide in the presence of platinum.
Option c – Hydrolysis of methyl acetate presence of hydrochloric acid.
The enzyme ……… converts starch to maltose.
(A) pepsin
(B) zymase
(C) diastase
(D) trypsin
Option c – diastase
The Langmuir adsorption isotherm is deduced using which of the following assumptions?
(A) The adsorption is multilayered.
(B) The adsorption sites are equivalent in their ability to adsorb the particle.
(C) The adsorption sites are of different sizes and shapes.
(D) The adsorbed molecules interact with each other.
Option b – The adsorption sites are equivalent in their ability to adsorb the particle.
Identify the CORRECT statement.
(A) Aqueous solutions of proteins form multimolecular colloids.
(B) Depending on the physical state of the dispersed phase and dispersion medium, seven types of colloidal systems are possible.
(C) If the dispersed phase is alcohol, then the sol is called alcohol.
(D) In lyophilic colloids, the particles of the dispersed phase have a great affinity for the dispersion medium.
Option d – In lyophilic colloids, the particles of the dispersed phase have a great affinity for the dispersion medium.
Delta formation at the junction where river water meets sea water is an example of ………
(A) peptization
(B) dialysis
(C) coagulation
(D) Brownian motion
Option c – coagulation
……… is an example of negatively charged sol.
(A) Blood
(B) Methylene blue sol
(C) Al(OH)3 sol
(D) Gum sol
Option d – Gum sol
Which of the following is CORRECT for hydrolysis of sucrose catalyzed by H ions furnished by sulphuric acid?
(A) Both the reactants and the catalyst are in the same phase.
(B) The reactants are in the liquid phase while the catalyst is in the solid state.
(C) This reaction is an example of heterogeneous catalysis.
(D) Both the reactants and the catalyst are in the gaseous phase.
Option a – Both the reactants and the catalyst are in the same phase.
Which of the following statements is INCORRECT?
(A) Particles of colloidal solution scatter light.
(B) Particles of colloidal solution are invisible under an ordinary microscope.
(C) Particles of colloidal solution can pass through ordinary filter paper.
(D) Particles of colloidal solution settle down rapidly due to gravity.
Option d – Particles of colloidal solution settle down rapidly due to gravity.
The sulphur sol is an example of ………. ( MCQ on Surface Chemistry )
(A) associated colloid
(B) lyophilic colloid
(C) multimolecular colloid
(D) macromolecular colloid
Option c – multimolecular colloid
In Haber’s process for the manufacture of NH3, …….. ( MCQ on Surface Chemistry )
(A) Mo acts as a catalyst and Fe acts as a promoter
(B) Fe acts as a catalyst and Mo acts as a promoter
(C) Fe acts as an inhibitor and Mo acts as a catalyst
(D) Fe acts as a promoter and Mo acts as an autocatalyst
Option b – Fe acts as a catalyst and Mo acts as a promoter
3 g of activated charcoal was added to 52 mL of acetic acid solution (0.06 M) in a flask. After an hour, it was filtered. The strength and the volume of the filtrate were found to be 0.045 M and 50 mL respectively. The amount of acetic acid adsorbed (per gram of charcoal) is ………
(A) 17.4 mg
(B) 34.8 mg
(C) 45.6 mg
(D) 52.2 mg
Option a – 17.4 mg
Bredig’s arc method is ………. ( MCQ on Surface Chemistry )
(A) used in the purification of colloids
(B) used in the preparation of colloids
(C) used in the coagulation of colloids
(D) used to study the Tyndall effect in colloids
Option b – used in the preparation of colloids
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