Take 5 chapter-wise practice tests of 25 questions each on Surface Chemistry for NEET with +4/-1 scoring, answer review, and concise explanations.
5 original practice tests, 25 questions each, NEET 4/-1 marking, and answer review after submission.
Top banner before test cards for Surface Chemistry.
1. Adsorption is a phenomenon of accumulation at the:
Explanation: Adsorption is strictly a surface phenomenon.
2. Absorption differs from adsorption because absorption is a:
Explanation: Absorption occurs throughout the bulk.
3. Physisorption is mainly due to:
Explanation: Weak intermolecular forces dominate physisorption.
4. Chemisorption generally involves:
Explanation: It is stronger and often more specific than physisorption.
5. Enthalpy of physisorption is generally:
Explanation: Weak forces mean smaller heat evolved.
6. Enthalpy of chemisorption is generally:
Explanation: Bond formation releases more heat.
7. A catalyst alters the rate of reaction but does not change:
Explanation: Catalysts affect kinetics, not thermodynamic equilibrium.
8. If catalyst and reactants are in different phases, catalysis is:
Explanation: Different phases define heterogeneous catalysis.
9. If catalyst and reactants are in the same phase, catalysis is:
Explanation: Same-phase systems show homogeneous catalysis.
10. In heterogeneous catalysis, reactants are often activated after:
Explanation: Surface adsorption weakens bonds and aids reaction.
11. A promoter is a substance that:
Explanation: It improves catalyst performance.
12. Catalyst poisoning means:
Explanation: Poison blocks active sites.
13. Enzymes are biological catalysts that are usually:
Explanation: Enzymes often act on specific substrates.
14. Particle size in colloidal solutions lies approximately between:
Explanation: That is the usual colloidal size range.
15. The substance distributed as particles in a colloid is called:
Explanation: It is the phase broken into colloidal particles.
16. The continuous phase in a colloid is called:
Explanation: It surrounds the dispersed particles.
17. Scattering of light by colloidal particles is called:
Explanation: Colloids scatter light and make its path visible.
18. Zig-zag random motion of colloidal particles is called:
Explanation: It results from uneven collisions with medium molecules.
19. Movement of colloidal particles under electric field is:
Explanation: Charged colloidal particles move toward the opposite electrode.
20. Destabilisation and settling of colloidal particles is called:
Explanation: Electrolytes can neutralise colloidal charge and coagulate the sol.
21. According to Hardy-Schulze rule, coagulating power of an ion depends on:
Explanation: Higher valency counter-ions coagulate more effectively.
22. Micelles are formed by substances that act as:
Explanation: They aggregate above the critical micelle concentration.
23. Micelles start forming above a certain concentration called:
Explanation: Below this value surfactant mostly stays as individual molecules.
24. An emulsion is a colloidal system of:
Explanation: One immiscible liquid is dispersed in another.
25. An emulsifier helps by:
Explanation: It prevents dispersed droplets from coalescing.
26. Adsorption is a phenomenon of accumulation at the:
Explanation: Adsorption is strictly a surface phenomenon.
27. Absorption differs from adsorption because absorption is a:
Explanation: Absorption occurs throughout the bulk.
28. Physisorption is mainly due to:
Explanation: Weak intermolecular forces dominate physisorption.
29. Chemisorption generally involves:
Explanation: It is stronger and often more specific than physisorption.
30. Enthalpy of physisorption is generally:
Explanation: Weak forces mean smaller heat evolved.
31. Enthalpy of chemisorption is generally:
Explanation: Bond formation releases more heat.
32. A catalyst alters the rate of reaction but does not change:
Explanation: Catalysts affect kinetics, not thermodynamic equilibrium.
33. If catalyst and reactants are in different phases, catalysis is:
Explanation: Different phases define heterogeneous catalysis.
34. If catalyst and reactants are in the same phase, catalysis is:
Explanation: Same-phase systems show homogeneous catalysis.
35. In heterogeneous catalysis, reactants are often activated after:
Explanation: Surface adsorption weakens bonds and aids reaction.
36. A promoter is a substance that:
Explanation: It improves catalyst performance.
37. Catalyst poisoning means:
Explanation: Poison blocks active sites.
38. Enzymes are biological catalysts that are usually:
Explanation: Enzymes often act on specific substrates.
39. Particle size in colloidal solutions lies approximately between:
Explanation: That is the usual colloidal size range.
40. The substance distributed as particles in a colloid is called:
Explanation: It is the phase broken into colloidal particles.
41. The continuous phase in a colloid is called:
Explanation: It surrounds the dispersed particles.
42. Scattering of light by colloidal particles is called:
Explanation: Colloids scatter light and make its path visible.
43. Zig-zag random motion of colloidal particles is called:
Explanation: It results from uneven collisions with medium molecules.
44. Movement of colloidal particles under electric field is:
Explanation: Charged colloidal particles move toward the opposite electrode.
45. Destabilisation and settling of colloidal particles is called:
Explanation: Electrolytes can neutralise colloidal charge and coagulate the sol.
46. According to Hardy-Schulze rule, coagulating power of an ion depends on:
Explanation: Higher valency counter-ions coagulate more effectively.
47. Micelles are formed by substances that act as:
Explanation: They aggregate above the critical micelle concentration.
48. Micelles start forming above a certain concentration called:
Explanation: Below this value surfactant mostly stays as individual molecules.
49. An emulsion is a colloidal system of:
Explanation: One immiscible liquid is dispersed in another.
50. An emulsifier helps by:
Explanation: It prevents dispersed droplets from coalescing.
51. Adsorption is a phenomenon of accumulation at the:
Explanation: Adsorption is strictly a surface phenomenon.
52. Absorption differs from adsorption because absorption is a:
Explanation: Absorption occurs throughout the bulk.
53. Physisorption is mainly due to:
Explanation: Weak intermolecular forces dominate physisorption.
54. Chemisorption generally involves:
Explanation: It is stronger and often more specific than physisorption.
55. Enthalpy of physisorption is generally:
Explanation: Weak forces mean smaller heat evolved.
56. Enthalpy of chemisorption is generally:
Explanation: Bond formation releases more heat.
57. A catalyst alters the rate of reaction but does not change:
Explanation: Catalysts affect kinetics, not thermodynamic equilibrium.
58. If catalyst and reactants are in different phases, catalysis is:
Explanation: Different phases define heterogeneous catalysis.
59. If catalyst and reactants are in the same phase, catalysis is:
Explanation: Same-phase systems show homogeneous catalysis.
60. In heterogeneous catalysis, reactants are often activated after:
Explanation: Surface adsorption weakens bonds and aids reaction.
61. A promoter is a substance that:
Explanation: It improves catalyst performance.
62. Catalyst poisoning means:
Explanation: Poison blocks active sites.
63. Enzymes are biological catalysts that are usually:
Explanation: Enzymes often act on specific substrates.
64. Particle size in colloidal solutions lies approximately between:
Explanation: That is the usual colloidal size range.
65. The substance distributed as particles in a colloid is called:
Explanation: It is the phase broken into colloidal particles.
66. The continuous phase in a colloid is called:
Explanation: It surrounds the dispersed particles.
67. Scattering of light by colloidal particles is called:
Explanation: Colloids scatter light and make its path visible.
68. Zig-zag random motion of colloidal particles is called:
Explanation: It results from uneven collisions with medium molecules.
69. Movement of colloidal particles under electric field is:
Explanation: Charged colloidal particles move toward the opposite electrode.
70. Destabilisation and settling of colloidal particles is called:
Explanation: Electrolytes can neutralise colloidal charge and coagulate the sol.
71. According to Hardy-Schulze rule, coagulating power of an ion depends on:
Explanation: Higher valency counter-ions coagulate more effectively.
72. Micelles are formed by substances that act as:
Explanation: They aggregate above the critical micelle concentration.
73. Micelles start forming above a certain concentration called:
Explanation: Below this value surfactant mostly stays as individual molecules.
74. An emulsion is a colloidal system of:
Explanation: One immiscible liquid is dispersed in another.
75. An emulsifier helps by:
Explanation: It prevents dispersed droplets from coalescing.
76. Adsorption is a phenomenon of accumulation at the:
Explanation: Adsorption is strictly a surface phenomenon.
77. Absorption differs from adsorption because absorption is a:
Explanation: Absorption occurs throughout the bulk.
78. Physisorption is mainly due to:
Explanation: Weak intermolecular forces dominate physisorption.
79. Chemisorption generally involves:
Explanation: It is stronger and often more specific than physisorption.
80. Enthalpy of physisorption is generally:
Explanation: Weak forces mean smaller heat evolved.
81. Enthalpy of chemisorption is generally:
Explanation: Bond formation releases more heat.
82. A catalyst alters the rate of reaction but does not change:
Explanation: Catalysts affect kinetics, not thermodynamic equilibrium.
83. If catalyst and reactants are in different phases, catalysis is:
Explanation: Different phases define heterogeneous catalysis.
84. If catalyst and reactants are in the same phase, catalysis is:
Explanation: Same-phase systems show homogeneous catalysis.
85. In heterogeneous catalysis, reactants are often activated after:
Explanation: Surface adsorption weakens bonds and aids reaction.
86. A promoter is a substance that:
Explanation: It improves catalyst performance.
87. Catalyst poisoning means:
Explanation: Poison blocks active sites.
88. Enzymes are biological catalysts that are usually:
Explanation: Enzymes often act on specific substrates.
89. Particle size in colloidal solutions lies approximately between:
Explanation: That is the usual colloidal size range.
90. The substance distributed as particles in a colloid is called:
Explanation: It is the phase broken into colloidal particles.
91. The continuous phase in a colloid is called:
Explanation: It surrounds the dispersed particles.
92. Scattering of light by colloidal particles is called:
Explanation: Colloids scatter light and make its path visible.
93. Zig-zag random motion of colloidal particles is called:
Explanation: It results from uneven collisions with medium molecules.
94. Movement of colloidal particles under electric field is:
Explanation: Charged colloidal particles move toward the opposite electrode.
95. Destabilisation and settling of colloidal particles is called:
Explanation: Electrolytes can neutralise colloidal charge and coagulate the sol.
96. According to Hardy-Schulze rule, coagulating power of an ion depends on:
Explanation: Higher valency counter-ions coagulate more effectively.
97. Micelles are formed by substances that act as:
Explanation: They aggregate above the critical micelle concentration.
98. Micelles start forming above a certain concentration called:
Explanation: Below this value surfactant mostly stays as individual molecules.
99. An emulsion is a colloidal system of:
Explanation: One immiscible liquid is dispersed in another.
100. An emulsifier helps by:
Explanation: It prevents dispersed droplets from coalescing.
101. Adsorption is a phenomenon of accumulation at the:
Explanation: Adsorption is strictly a surface phenomenon.
102. Absorption differs from adsorption because absorption is a:
Explanation: Absorption occurs throughout the bulk.
103. Physisorption is mainly due to:
Explanation: Weak intermolecular forces dominate physisorption.
104. Chemisorption generally involves:
Explanation: It is stronger and often more specific than physisorption.
105. Enthalpy of physisorption is generally:
Explanation: Weak forces mean smaller heat evolved.
106. Enthalpy of chemisorption is generally:
Explanation: Bond formation releases more heat.
107. A catalyst alters the rate of reaction but does not change:
Explanation: Catalysts affect kinetics, not thermodynamic equilibrium.
108. If catalyst and reactants are in different phases, catalysis is:
Explanation: Different phases define heterogeneous catalysis.
109. If catalyst and reactants are in the same phase, catalysis is:
Explanation: Same-phase systems show homogeneous catalysis.
110. In heterogeneous catalysis, reactants are often activated after:
Explanation: Surface adsorption weakens bonds and aids reaction.
111. A promoter is a substance that:
Explanation: It improves catalyst performance.
112. Catalyst poisoning means:
Explanation: Poison blocks active sites.
113. Enzymes are biological catalysts that are usually:
Explanation: Enzymes often act on specific substrates.
114. Particle size in colloidal solutions lies approximately between:
Explanation: That is the usual colloidal size range.
115. The substance distributed as particles in a colloid is called:
Explanation: It is the phase broken into colloidal particles.
116. The continuous phase in a colloid is called:
Explanation: It surrounds the dispersed particles.
117. Scattering of light by colloidal particles is called:
Explanation: Colloids scatter light and make its path visible.
118. Zig-zag random motion of colloidal particles is called:
Explanation: It results from uneven collisions with medium molecules.
119. Movement of colloidal particles under electric field is:
Explanation: Charged colloidal particles move toward the opposite electrode.
120. Destabilisation and settling of colloidal particles is called:
Explanation: Electrolytes can neutralise colloidal charge and coagulate the sol.
121. According to Hardy-Schulze rule, coagulating power of an ion depends on:
Explanation: Higher valency counter-ions coagulate more effectively.
122. Micelles are formed by substances that act as:
Explanation: They aggregate above the critical micelle concentration.
123. Micelles start forming above a certain concentration called:
Explanation: Below this value surfactant mostly stays as individual molecules.
124. An emulsion is a colloidal system of:
Explanation: One immiscible liquid is dispersed in another.
125. An emulsifier helps by:
Explanation: It prevents dispersed droplets from coalescing.