Multiple Choice Questions (MCQs) for JEE Chemistry: Surface Chemistry
Access targeted multiple-choice questions for Surface Chemistry designed to align with the latest JEE academic syllabus for JEE Chemistry. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.
Practice Surface Chemistry MCQs for JEE Chemistry
View or download the dedicated Surface Chemistry MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Chemistry evaluations.
Multiple Choice Questions
(a) Higher temperature
(b) Lower temperature
(c) Room temperature only
(d) \( 100^\circ \)C
Show Answer & Explanation
Answer: (b) Lower temperature
Explanation:
1. Physical adsorption is exothermic and is favoured at low temperature.
2. It decreases as temperature rises.
Teacher's Note:
1. Physisorption falls with temperature.
2. Chemisorption first rises, then falls.
(a) Decreases with increase of pressure
(b) Is independent of pressure at high pressure
(c) Is maximum at one atmosphere pressure
(d) Always increases with increase of pressure
Show Answer & Explanation
Answer: (b) Is independent of pressure at high pressure
Explanation:
1. Adsorption increases with pressure at first and then reaches saturation.
2. At high pressure the surface is full and the extent becomes independent of pressure.
Teacher's Note:
1. Adsorption isotherm levels off at high pressure.
(a) Physical adsorption is reversible in nature
(b) Physical adsorption involves van der Waals forces
(c) The rate of physical adsorption increases with increase of pressure on the adsorbate
(d) High activation energy is involved in physical adsorption
Show Answer & Explanation
Answer: (d) High activation energy is involved in physical adsorption
Explanation:
1. Physical adsorption needs almost no activation energy.
2. The other statements are correct.
Teacher's Note:
1. Chemisorption needs activation energy, physisorption does not.
(a) Langmuir adsorption is highly specific
(b) van der Waals adsorption is reversible
(c) Both are exothermic
(d) All are correct
Show Answer & Explanation
Answer: (d) All are correct
Explanation:
1. Langmuir (chemical) adsorption is specific and van der Waals adsorption is reversible.
2. Both kinds of adsorption are exothermic, so all statements are correct.
Teacher's Note:
1. All adsorption is exothermic.
(a) Physical adsorption in general decreases with temperature
(b) Physical adsorption in general increases with temperature
(c) Physical adsorption is a reversible process
(d) Adsorption is limited to the surface only
Show Answer & Explanation
Answer: (b) Physical adsorption in general increases with temperature
Explanation:
1. Physical adsorption is exothermic, so it decreases as temperature increases.
2. Statement 2 says the opposite and is wrong.
Teacher's Note:
1. Rule: exothermic process is favoured by low temperature.
(a) Adsorption takes place
(b) Absorption takes place
(c) Both adsorption and absorption take place
(d) Desorption takes place
Show Answer & Explanation
Answer: (c) Both adsorption and absorption take place
Explanation:
1. Sorption refers to adsorption and absorption occurring together.
2. Desorption is the reverse of adsorption.
Teacher's Note:
1. Sorption = adsorption + absorption.
(a) The nature of the gas
(b) The pressure of the gas
(c) The temperature of the system
(d) All of these
Show Answer & Explanation
Answer: (d) All of these
Explanation:
1. Adsorption depends on the nature of the gas and solid, pressure, temperature and surface area.
2. All three listed factors matter.
Teacher's Note:
1. Freundlich isotherm links x/m with p and T.
(a) 2
(b) 4
(c) 3
(d) 1
Show Answer & Explanation
Answer: (a) 2
Explanation:
1. A colloid has two phases, the dispersed phase and the dispersion medium.
2. Hence it is a heterogeneous system.
Teacher's Note:
1. Two phases: dispersed and medium.
(a) Reversible
(b) Irreversible
(c) Water loving
(d) Solvent loving
Show Answer & Explanation
Answer: (b) Irreversible
Explanation:
1. Lyophobic (solvent hating) sols are irreversible because once coagulated they do not form the sol again on adding the solvent.
2. Lyophilic sols are reversible.
Teacher's Note:
1. Lyophobic: needs stabilisers.
2. Lyophilic: self-stable.
(a) Hardy and Schulze
(b) Graham
(c) Kossel and Lewis
(d) Faraday
Show Answer & Explanation
Answer: (a) Hardy and Schulze
Explanation:
1. The Hardy-Schulze rule relates the coagulating power of an ion to its charge.
2. It applies to the ion of charge opposite to that of the sol.
Teacher's Note:
1. Al3+ > Ba2+ > Na+ for negative sols.
(a) Very high osmotic pressure
(b) High osmotic pressure
(c) Low osmotic pressure
(d) No osmotic pressure
Show Answer & Explanation
Answer: (c) Low osmotic pressure
Explanation:
1. Colloidal particles are big, so the number of particles per unit volume is small.
2. Hence the colligative properties and osmotic pressure are low.
Teacher's Note:
1. Large particle size gives low colligative effects.
(a) Optical
(b) Electrical
(c) Kinetic
(d) Chemical
Show Answer & Explanation
Answer: (c) Kinetic
Explanation:
1. Brownian motion arises from collisions of the particles with the molecules of the medium.
2. It is a kinetic property.
Teacher's Note:
1. Tyndall effect is optical.
2. Electrophoresis is electrical.
(a) Water
(b) Small molecules
(c) Colloids
(d) All
Show Answer & Explanation
Answer: (c) Colloids
Explanation:
1. A semipermeable membrane lets water and small molecules pass but not colloidal particles.
2. That is the basis of dialysis.
Teacher's Note:
1. Colloidal particles are too big.
(a) A state of dissolution
(b) A state of dispersion
(c) A state of suspension
(d) None
Show Answer & Explanation
Answer: (b) A state of dispersion
Explanation:
1. A colloid is a dispersion of one phase in another, not a true solution or a suspension.
2. The particle size is 1 to 1000 nm.
Teacher's Note:
1. Colloidal state is a state of dispersion.
(a) Adsorption
(b) Tyndall effect
(c) Flocculation
(d) Paramagnetism
Show Answer & Explanation
Answer: (d) Paramagnetism
Explanation:
1. Sols show adsorption, Tyndall scattering and coagulation (flocculation).
2. Paramagnetism is a magnetic property that is not characteristic of colloids.
Teacher's Note:
1. Colloidal properties: optical, kinetic, electrical.
(a) Soaps
(b) Synthetic detergents
(c) Lyophilic sols
(d) All of the above
Show Answer & Explanation
Answer: (d) All of the above
Explanation:
1. Soaps, detergents and lyophilic sols (gelatin, gum) can all stabilise emulsions.
2. So all three are emulsifiers.
Teacher's Note:
1. Lyophilic sols act as protective colloids.
(a) 100 mL of 0.1 M AgNO3 + 100 mL of 0.1 M KI
(b) 100 mL of 0.1 M AgNO3 + 50 mL of 0.2 M KI
(c) 200 mL of 0.1 M AgNO3 + 200 mL of 0.1 M KI
(d) 100 mL of 0.1 M AgNO3 + 100 mL of 0.15 M KI
Show Answer & Explanation
Answer: (d) 100 mL of 0.1 M AgNO3 + 100 mL of 0.15 M KI
Explanation:
1. A negative AgI sol needs excess iodide so that I- is adsorbed.
2. Option 4 has 10 mmol Ag+ and 15 mmol I-, an excess of iodide; the others have equal amounts.
Teacher's Note:
1. Excess KI gives a negative sol.
2. Excess AgNO3 gives a positive sol.
(a) \( \ce{Cl-} \)
(b) \( \ce{SO4^{2-}} \)
(c) \( \ce{PO4^{3-}} \)
(d) \( \ce{[Fe(CN)6]^{4-}} \)
Show Answer & Explanation
Answer: (d) \( \ce{[Fe(CN)6]^{4-}} \)
Explanation:
1. The ion with the highest charge of opposite sign, [Fe(CN)6]4-, coagulates the sol at the lowest concentration.
2. A smaller flocculation value means higher coagulating power.
Teacher's Note:
1. Flocculation value is the minimum concentration needed.
(a) Smoke
(b) Ink
(c) Air
(d) Blood
Show Answer & Explanation
Answer: (c) Air
Explanation:
1. Air is a homogeneous mixture of gases.
2. Smoke, ink and blood are colloids.
Teacher's Note:
1. Smoke is a solid in gas colloid.
(a) Colloidal state
(b) Solid state
(c) Granular state
(d) All of the above
Show Answer & Explanation
Answer: (a) Colloidal state
Explanation:
1. The colloidal state has a large surface area, so medicines are assimilated quickly.
2. Examples are colloidal silver and colloidal sulphur.
Teacher's Note:
1. Large surface area increases effectiveness.
(a) Gold sol
(b) As2S3 sol
(c) Fe(OH)3 sol
(d) All of these
Show Answer & Explanation
Answer: (d) All of these
Explanation:
1. Gelatin is a protective colloid that stabilises lyophobic sols.
2. It protects all three sols.
Teacher's Note:
1. Gold number measures this protection.
Free study material for Chemistry
Multiple Choice Questions (MCQs) for JEE Chemistry Surface Chemistry
JEE Chemistry Surface Chemistry Objective Test Questions
Test your conceptual understanding of Surface Chemistry with these targeted multiple-choice questions. Designed in alignment with the latest JEE curriculum for JEE Chemistry, these problem sets build accuracy and prepare students for objective exams.
NCERT-Aligned Objective Questions and Solutions
Each question includes structured solution keys mapped directly to standard JEE textbooks, helping students evaluate their reasoning and correct mistakes early in their revision.
Next Steps in Your Exam Preparation
Follow up your worksheet practice by attempting the interactive online Chemistry MCQ test for this chapter to evaluate your execution speed. All platform resources are free to access.
FAQs
You can get most exhaustive JEE Chemistry Surface Chemistry MCQs Set 04 for free on StudiesToday.com. These MCQs for JEE Chemistry are updated for the 2026-27 academic session as per JEE examination standards.
Yes, our JEE Chemistry Surface Chemistry MCQs Set 04 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the JEE paper is now competency-based.
By solving our JEE Chemistry Surface Chemistry MCQs Set 04, JEE students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Chemistry.
Yes, Chemistry MCQs for JEE have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused JEE exams.
Yes, you can also access online interactive tests for JEE Chemistry Surface Chemistry MCQs Set 04 on StudiesToday.com as they provide instant answers and score to help you track your progress in Chemistry.