Statement Type Surface Chemistry Questions for NEET
In case of the following questions, a statement I is given
followed by a corresponding statement II just below it.
If the statements. Mark the correct answer from the following statements.
1. Bothe statement I and statement II are correct and statement II is the correct explanation of statement I
2. Both statement I and statement II are correct but statement II is not the Correct explanation of statement II
3. statement I is correct while statement II is wrong
4. statement I is wrong while statement II is correct
1. Statement I: Adsorption is not a surface phenomenon
Statement II: Adsorption is an exothermic process
2. Statement I: The enthalpy of physisorption is greater than chemisorption
Statement II: Molecules of adsorbate and adsorbent are held by van der Waal’s forces in physisorption and chemical bonds in chemisorption
3. Statement I: Silica gel is used for drying air
Statement II: Silica gel adsorbs moisture from air
4. Statement I: d-Block elements are good adsorbents
Statement II: d-Block elements have free valencies
5. Statement I: Adsorption decreases with increasing temperature
Statement II: Adsorption is generally temperature dependent
6. Statement I: A positive catalyst can increase the rate of forward reaction and decreases the rate of backward reaction of a reversible reaction
Statement II: Catalyst can increase both forward and backward reactions to the same extent
7. Statement I: Alcohol acts as positive catalyst for the oxidation of chloroform
Statement II: A positive catalyst increase the rate of reaction
8. Statement I: Rate can be altered by the presence of catalyst
Statement II: Catalyst enhances the yield of product
9. Statement I: In Haber’s synthesis, the rate of formation of NH3 is increased by adding iron
Statement II: Iron acts as catalyst for Haber's process
10. Statement I: Gases between themselves cannot form a colloidal solution
Statement II: Gases give homogeneous mixture
11. Statement I: Lyophilic colloids are called as reversible
Statement II: Lyophilic sols are liquid loving
12. Statement I: Colloidal sols scatter light while true solutions do not
Statement II: The particles in the colloidal sol move much slower than that of true solution
13. Statement I: Colloidal particles show Brownian movementStatement II: Adsorption is an exothermic process
Statement II: Colloidal particles are smaller than precipitates
14. Statement I: Milk is an example of water in oil emulsions
Statement II: Emulsions contain liquid dispersed in liquid
15. Statement I: When finely divided active carbon or clay is stirred into a dilute solution of dye. The intensity of colour in the solution is decreased
Statement II: The dye is adsorbed on the solid surface
16. Statement I: Charcoal is a good adsorbent
Statement II: Charcoal has highly porous structure
17. Statement I: Water vapours are abso
rbed by anhydrous calcium chloride Statement II: Absorption and adsorption are similar Processes
18. Statement I: In chemisorptions, adsorption keeps on increasing with temperature but again decreases after reacting maximum
Statement II: Heat keeps on providing more and more activation energy
19. Statement I: Porous or finely divided forms of adsorbents adsorb large quantities of adsorbate
Statement II: the greater the specific area of the solid, the greater would be adsorbing capacity
20. Statement I: In chemisorption all gases are adsorbed on all sides
Statement II: Chemisorption takes place at higher temperatures
21. Statement I: According to Freundlich x/m = KP1/n
Statement II: The isotherm shows variation of the amount adsorbed by the adsorbent with temperature
22. Statement I: Catalyst increase the rate of reaction
Statement II: Catalyst functions by lowering the energy of activation
23. Statement I: NO acts as homogeneous catalysts in the oxidation of CO by O2
Statement II: NO increases the rate of oxidation
24. Statement I: A reaction cannot become fast by itself unless a catalyst is added
Statement II: A catalyst increase the rate of reaction by changing reaction path in which activation energy is less
25. Statement I: Same reactants give different products with different catalysts
Statement II: Catalysts are highly specific or selective
26. Statement I: Substances whose solutions cannot pass through filter paper are called colloids
Statement II: The size of colloidal particles is smaller than the size of suspension particles
27. Statement I: Colloid is a heterogeneous system
Statement II: Colloidal particle have enormous surface area per gram as a result of their small size
28. Statement I: Lyophilic colloids are called reversible sols
Statement II: Lyophilic sols are liquid loving
29. Statement I: An emulsion becomes stable if soap is added to it
Statement II: Soap contains hydrophilic and hydrophobic parts
30. Statement I: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles
Statement II: Pore size of the filter paper becomes more than the size of colloidal particle
31. Statement I: Colloidal particles show colligative properties
Statement II: Colloidal particles are large in size
32. Statement I: Coagulation power of Al+3 is more than Na+
Statement II: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy–Schulz rule)
33. Statement I: Detergents with low CMC are more economical
Statement II: Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents become equal to CMC
34. Statement I: NH3 is adsorbed more on activated coconut charcoal than H2
Statement II: Critical temperature of NH3 is more thanthat of H2
35. Statement I: For adsorption ΔG, ΔH and ΔS all halve negative values
Statement II: Adsorption is spontaneous process accompanied by decrease in randomness
36. Statement I: Enzyme catalysed reactions are of first order
Statement II: Enzymes never undergo any change
37. Statement I: A colloidal sol of Fe(OH)3 formed by peptization carries positive charge by using FeCl3
Statement II: During formation of Fe(OH)3 sols, electrons are lost by the particles
38. Statement I: The formation of micelles takes place only above a particular temperature called Kraft Temperature (TK)
Statement II: Associated colloids revert back to individual ions on dilution
39. Statement I: Micelles are formed by surfactant molecules above the critical micellar concentration (CMC)
Statement II: The conductivity of solution having surfactant molecules decreases sharply at the CMC
40. Statement I: Addition of AgNO3(aq) to KI(aq) to gives positive sol whereas addition of KI (aq) to AgNO3(aq) gives positive sol
Statement II: The sol particle adsorb the common ions present in solution and aquire their charge
41. Statement I: Sol particles show Tyndall effect
Statement II: The scattering is directly proportional to size of sol particle
42. Statement I: Colloidal solution is electrically neutral
Statement II: Due to similar nature of the charge carried by the particles, they repel each other and do not combine to form bigger molecules
43. Statement I: Soaps and detergents are macro-mo- lecular colloids
Statement II: Soaps and detergents are molecules of large size
44. Statement I: Gold sol is multimolecular and hydrophobic in nature
Statement II: Gold sol is prepared by Bredig’s arc method
45. Statement I: At pH of isoelectric point, the sol particles of amino acids neither move towards anode nor towards cathode
Statement II: Because at the isoelectric point, the concentration of conjugate base and conjugate acid of the zwitter ions becomes equal and so one’s charge is counterbalanced by other
Answer
Class-11
Class-12
1. Bothe statement I and statement II are correct and statement II is the correct explanation of statement I
2. Both statement I and statement II are correct but statement II is not the Correct explanation of statement II
3. statement I is correct while statement II is wrong
4. statement I is wrong while statement II is correct
1. Statement I: Adsorption is not a surface phenomenon
Statement II: Adsorption is an exothermic process
2. Statement I: The enthalpy of physisorption is greater than chemisorption
Statement II: Molecules of adsorbate and adsorbent are held by van der Waal’s forces in physisorption and chemical bonds in chemisorption
3. Statement I: Silica gel is used for drying air
Statement II: Silica gel adsorbs moisture from air
4. Statement I: d-Block elements are good adsorbents
Statement II: d-Block elements have free valencies
5. Statement I: Adsorption decreases with increasing temperature
Statement II: Adsorption is generally temperature dependent
6. Statement I: A positive catalyst can increase the rate of forward reaction and decreases the rate of backward reaction of a reversible reaction
Statement II: Catalyst can increase both forward and backward reactions to the same extent
7. Statement I: Alcohol acts as positive catalyst for the oxidation of chloroform
Statement II: A positive catalyst increase the rate of reaction
8. Statement I: Rate can be altered by the presence of catalyst
Statement II: Catalyst enhances the yield of product
9. Statement I: In Haber’s synthesis, the rate of formation of NH3 is increased by adding iron
Statement II: Iron acts as catalyst for Haber's process
10. Statement I: Gases between themselves cannot form a colloidal solution
Statement II: Gases give homogeneous mixture
11. Statement I: Lyophilic colloids are called as reversible
Statement II: Lyophilic sols are liquid loving
12. Statement I: Colloidal sols scatter light while true solutions do not
Statement II: The particles in the colloidal sol move much slower than that of true solution
13. Statement I: Colloidal particles show Brownian movementStatement II: Adsorption is an exothermic process
Statement II: Colloidal particles are smaller than precipitates
14. Statement I: Milk is an example of water in oil emulsions
Statement II: Emulsions contain liquid dispersed in liquid
15. Statement I: When finely divided active carbon or clay is stirred into a dilute solution of dye. The intensity of colour in the solution is decreased
Statement II: The dye is adsorbed on the solid surface
16. Statement I: Charcoal is a good adsorbent
Statement II: Charcoal has highly porous structure
17. Statement I: Water vapours are abso
rbed by anhydrous calcium chloride Statement II: Absorption and adsorption are similar Processes
18. Statement I: In chemisorptions, adsorption keeps on increasing with temperature but again decreases after reacting maximum
Statement II: Heat keeps on providing more and more activation energy
19. Statement I: Porous or finely divided forms of adsorbents adsorb large quantities of adsorbate
Statement II: the greater the specific area of the solid, the greater would be adsorbing capacity
20. Statement I: In chemisorption all gases are adsorbed on all sides
Statement II: Chemisorption takes place at higher temperatures
21. Statement I: According to Freundlich x/m = KP1/n
Statement II: The isotherm shows variation of the amount adsorbed by the adsorbent with temperature
22. Statement I: Catalyst increase the rate of reaction
Statement II: Catalyst functions by lowering the energy of activation
23. Statement I: NO acts as homogeneous catalysts in the oxidation of CO by O2
Statement II: NO increases the rate of oxidation
24. Statement I: A reaction cannot become fast by itself unless a catalyst is added
Statement II: A catalyst increase the rate of reaction by changing reaction path in which activation energy is less
25. Statement I: Same reactants give different products with different catalysts
Statement II: Catalysts are highly specific or selective
26. Statement I: Substances whose solutions cannot pass through filter paper are called colloids
Statement II: The size of colloidal particles is smaller than the size of suspension particles
27. Statement I: Colloid is a heterogeneous system
Statement II: Colloidal particle have enormous surface area per gram as a result of their small size
28. Statement I: Lyophilic colloids are called reversible sols
Statement II: Lyophilic sols are liquid loving
29. Statement I: An emulsion becomes stable if soap is added to it
Statement II: Soap contains hydrophilic and hydrophobic parts
30. Statement I: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles
Statement II: Pore size of the filter paper becomes more than the size of colloidal particle
31. Statement I: Colloidal particles show colligative properties
Statement II: Colloidal particles are large in size
32. Statement I: Coagulation power of Al+3 is more than Na+
Statement II: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy–Schulz rule)
33. Statement I: Detergents with low CMC are more economical
Statement II: Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents become equal to CMC
34. Statement I: NH3 is adsorbed more on activated coconut charcoal than H2
Statement II: Critical temperature of NH3 is more thanthat of H2
35. Statement I: For adsorption ΔG, ΔH and ΔS all halve negative values
Statement II: Adsorption is spontaneous process accompanied by decrease in randomness
36. Statement I: Enzyme catalysed reactions are of first order
Statement II: Enzymes never undergo any change
37. Statement I: A colloidal sol of Fe(OH)3 formed by peptization carries positive charge by using FeCl3
Statement II: During formation of Fe(OH)3 sols, electrons are lost by the particles
38. Statement I: The formation of micelles takes place only above a particular temperature called Kraft Temperature (TK)
Statement II: Associated colloids revert back to individual ions on dilution
39. Statement I: Micelles are formed by surfactant molecules above the critical micellar concentration (CMC)
Statement II: The conductivity of solution having surfactant molecules decreases sharply at the CMC
40. Statement I: Addition of AgNO3(aq) to KI(aq) to gives positive sol whereas addition of KI (aq) to AgNO3(aq) gives positive sol
Statement II: The sol particle adsorb the common ions present in solution and aquire their charge
41. Statement I: Sol particles show Tyndall effect
Statement II: The scattering is directly proportional to size of sol particle
42. Statement I: Colloidal solution is electrically neutral
Statement II: Due to similar nature of the charge carried by the particles, they repel each other and do not combine to form bigger molecules
43. Statement I: Soaps and detergents are macro-mo- lecular colloids
Statement II: Soaps and detergents are molecules of large size
44. Statement I: Gold sol is multimolecular and hydrophobic in nature
Statement II: Gold sol is prepared by Bredig’s arc method
45. Statement I: At pH of isoelectric point, the sol particles of amino acids neither move towards anode nor towards cathode
Statement II: Because at the isoelectric point, the concentration of conjugate base and conjugate acid of the zwitter ions becomes equal and so one’s charge is counterbalanced by other
Answer
| 1 - 4 | 2 - 4 | 3 - 1 | 4 - 1 | 5 - 2 |
| 6 - 4 | 7 - 4 | 8 - 3 | 9 - 1 | 10 - 1 |
| 11 - 1 | 12 - 2 | 13 - 1 | 14 - 4 | 15 - 1 |
| 16 - 1 | 17 - 3 | 18 - 1 | 19 - 1 | 20 - 14 |
| 21 - 3 | 22 - 1 | 23 - 2 | 24 - 4 | 25 - 1 |
| 26 - 4 | 27 - 2 | 18 - 2 | 29 - 2 | 30 - 3 |
| 31 - 2 | 32 - 1 | 33 - 1 | 34 - 1 | 35 - 2 |
| 36 - 4 | 37 - 3 | 38 - 2 | 39 - 2 | 40 - 1 |
| 41 - 1 | 42 - 2 | 43 - 4 | 44 - 2 | 45 - 1 |
Class-11
Class-12
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