Surface Chemistry — JEE Main PYQs & Practice Questions

Surface Chemistry is a Chemistry chapter in the JEE Main syllabus. This page brings together 84 previous-year and practice questions on Surface Chemistry, organised into 7 topics: Adsorption, Colloids and Emulsions, Catalysis, Adsorption Isotherms, Colloids, Coagulation and Emulsions and Gels. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Surface Chemistry JEE Main PYQs as a free PDF (with answer key)

Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Adsorption

• Match List I with List II LIST I | LIST II ; A. | Physisorption | I. | Single Layer…
• Given below are two statements : one is labelled as Assertion (A) and the other is…
• The number of incorrect statement/s from the following is/are ___________ A. Water…
• A mixture of gases O₂, H₂ and CO are taken in a closed vessel containing charcoal. The…
• The enthalpy change for the adsorption process and micelle formation respectively are
• Based on the given figure, the number of correct statement/s is/are __________. A…
• 100 mL of 0.3 M acetic acid is shaken with 0.8 g of wood charcoal. The final…
• Amongst the following statements regarding adsorption, those that are valid are (a) ΔH…
• Given below are two statements. One is labelled as Assertion A and the other is labelled…
• When 200 mL of 0.2 M acetic acid is shaken with 0.6 g of wood charcoal, the final…
• For the adsorption of hydrogen on platinum, the activation energy is 30 k J mol⁻¹ and…
• Given below are two statements: One is labelled as Assertion A and the other is labelled…
• Given below are two statement : one is labelled as Assertion A and the other is labelled…
• Which one of the following is correct for the adsorption of a gas at a given temperature…
• The number of statement/s which are the characteristics of physisorption is __________…
• Four gases A, B, C and D have critical temperatures 5.3,33.2,126.0 and 154.3 K…

Colloids and Emulsions

• Adding surfactants in non polar solvent, the micelles structure will look like
• The INCORRECT statements below regarding colloidal solutions is :
• For micelle formation, which of the following statements are correct? A. Micelle…

Catalysis

• Match List - I with List - II. List - I Reaction | List - II Catalyst; (A) | 4NH₃(g) +…
• Match List - I with List - II. List I (Processes / Reactions) | List II (Catalyst); (A)…
• Match List - I with List - II List - I (process) | List - II (catalyst); (a) | Deacron's…
• Match List I with List II List I | List II; (A) | N₂(g) + 3H₂(g) → 2NH₃(g) | (I) | Cu…
• The number of correct statements about modern adsorption theory of heterogeneous…
• For the following Assertion and Reason, the correct option is Assertion : For…
• The major component/ingredient of Portland Cement is :

Adsorption Isotherms

• In Freundlich adsorption isotherm, slope of AB line is :
• CO₂ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount…
• Among the following the number of curves not in accordance with Freundlich adsorption…
• In figure, a straight line is given for Freundrich Adsorption (y=3x+2.505). The value of…
• CH₄ is absorbed on 1g charcoal at 0°C following the Freundlich adsorpiton isotherm 10.0…
• The mass of gas adsorbed, x, per unit mass of adsorbate, m, was measured at various…
• In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption ( x/m )…
• Select the graph that correctly describes the adsorption isotherms at two temperatures…
• The graph of log x/m vs log p for an adsorption process is a straight line inclined at…
• For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and log p (x-axis)…
• If the initial pressure of a gas is 0.03 atm, the mass of the gas adsorbed per gram of…
• Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas…
• Which of the following represent the Freundlich adsorption isotherms? Choose the correct…

Colloids

• Which of the following is used for the preparation of colloids?
• An ionic micelle is formed on the addition of :
• Using very little soap while washing clothes, does not serve the purpose of cleaning of…
• Given below are two statements : one is labelled as Assertion (A) and the other is…
• Which one of the following statements is FALSE for hydrophilic sols?
• 100 mL of 5 % (w / v) solution of NaCl in water was prepared in 250 mL beaker. Albumin…
• Sodium stearate CH₃(CH₂)₁₆COO⁻Na⁺ is an anionic surfactant which forms micelles in oil…
• The nature of charge on resulting colloidal particles when FeCl₃ is added to excess of…
• Kraft temperature is the temperature :
• Incorrect statement for Tyndall effect is :
• Given below are two statements: one is labelled as Assertion A and the other is labelled…
• Statement I : For colloidal particles, the values of colligative properties are of small…
• The number of colloidal systems from the following, which will have 'liquid' as the…
• Given below are two statements, one is labelled as Assertion A and the other is labelled…
• The conditions given below are in the context of observing Tyndall effect in colloidal…
• Match List I and List II List I | List II; A. | Osmosis | I. | Solvent molecules pass…
• The number of elements in a micelle (soap micelle has one tail and one head group) — but…
• The charges on the colloidal CdS sol and TiO₂ sol are, respectively :
• Identify the correct molecular picture showing that happens at the critical micellar…
• When silver nitrate solution is added to potassium iodide solution then the sol produced…

Coagulation

• Ferric chloride is applied to stop bleeding because -
• A 42.12% (w/v) solution of NaCl causes precipitation of a certain sol in 10 hours. The…
• 100 ml of 0.0018% (w/v) solution of Cl⁻ ion was the minimum concentration of Cl⁻…
• The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L⁻¹ If H₂SO₄ is used…
• As per Hardy-Schulze formulation, the flocculation values of the following for ferric…
• Which of the following salt solutions would coagulate the colloid solution formed when…
• Coagulating value of the electrolytes AlCl₃ and NaCl for As₂ S₃ are 0.09 and 50.04…
• 20 mL of 0.5 M NaCl is required to coagulate 200 mL of As₂ S₃ solution in 2 hours. The…
• For the coagulation of a negative sol, the species below, that has the highest…
• Most suitable salt which can be used for efficient clotting of blood will be :

Emulsions and Gels

• Given below are two statements : Statement I : Emulsions of oil in water are unstable…

More Chemistry chapters

• Mole Concept & Stoichiometry
• Atomic Structure
• Gaseous State
• Chemical Thermodynamics
• Chemical Equilibrium
• Ionic Equilibrium
• Redox Reactions
• Solutions & Colligative Properties
• Electrochemistry
• Chemical Kinetics
• Solid State
• Nuclear & Radiochemistry
• Periodic Table & Periodicity
• Chemical Bonding & Molecular Structure
• Hydrogen & s-Block Elements
• p-Block Elements — Part I (Group 13 & 14)
• Environmental Chemistry
• p-Block Elements — Part II (Group 15-18)
• d & f Block Elements
• Coordination Compounds
• Metallurgy
• Qualitative Analysis — Salt Analysis
• Purification & Characterisation of Organic Compounds
• General Organic Chemistry (GOC)
• Hydrocarbons — Alkanes
• Hydrocarbons — Alkenes & Alkynes
• Hydrocarbons — Aromatic (Arenes)
• Halogen Derivatives — Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes & Ketones
• Carboxylic Acids & Their Derivatives
• Amines & Diazonium Salts
• Carbohydrates & Biomolecules
• Polymers
• Chemistry in Everyday Life
• Practical Organic Chemistry

Frequently asked questions

How many Surface Chemistry questions are there for JEE Main?

PrepWiser has 84 Surface Chemistry questions for JEE Main, grouped into 7 topics such as Adsorption, Colloids and Emulsions and Catalysis.

Are these Surface Chemistry questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Surface Chemistry questions?

Open any Surface Chemistry question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.