Statement Type Surface Chemistry Questions for NEET

Statement Type Surface Chemistry Questions for NEET

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
1 - 42 - 43 - 14 - 15 - 2
6 - 47 - 48 - 39 - 110 - 1
11 - 112 - 213 - 114 - 415 - 1
16 - 117 - 318 - 119 - 120 - 14
21 - 322 - 123 - 224 - 425 - 1
26 - 427 - 218 - 229 - 230 - 3
31 - 232 - 133 - 134 - 135 - 2
36 - 437 - 338 - 239 - 240 - 1
41 - 142 - 243 - 444 - 245 - 1