JEE PYQ Surface Chemistry - Chapter-wise Questions with Solutions

About Surface Chemistry PYQs

Surface Chemistry has 195 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 195 questions in this list come from JEE Main (122), NTA Abhyas JEE Main (47), JEE Advanced (16) and 1 other source, spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

JEE Surface Chemistry PYQs with Solutions

About Surface Chemistry PYQs

Questions by year (this list)

Surface Chemistry questions with solutions

At a given temperature, 0.45 g of acetic acid in 50 mL of water is shaken with 1.0 g of charcoal and the pH of the resulting solution is 3.0 . Assume, the adsorption of acetic

Adsorption of phenol from its aqueous solution on to fly ash obeys Freundlich isotherm. At a given temperature, from 10 mg g^ -1 and 16 mg g^ -1 aqueous phenol solutions, the

Consider the following statements related to colloids. (I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium. (II) For emulsions, both

20mL of 0 . 5MNaCl is required to coagulate 200mL of As _ 2 S _ 3 solution in 2 hours. The coagulating value of NaCl is ___________.

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The diameter of colloidal particles in solution should not be

What happens when a lyophilic sol is added to a lyophobic sol?

Four gases, A, B, C and D have critical temperatures 5 . 3, 33 . 2, 126 . 0 and 154 . 3K respectively For their adsorption on a fixed amount of charcoal, the correct order is :

The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ...... A. The catalyst is diffused over the surface of reactants.

Ferric chloride is applied to stop bleeding because

The statement/s which are true about antagonists from the following is/are: A. They bind to the receptor site. B. Get transferred inside the cell for their action. C. Inhibit the

Coagulating value of the electrolytes AlCl _ 3 and NaCl tor As _ 2 S _ 3 are 0 . 09 and 50 . 04 respectively. The coagulating power of AlCl _ 3 is x times the coagulating power of

The water gas on reacting with cobalt as a catalyst forms

Which of the following represents the Freundlich adsorption isotherms? (A) (B) (C) (D) Choose the correct answer from the options given below:

The number of colloidal systems from the following, which will have &#39;liquid&#39; as the dispersion medium, is _____. Gem stones, paints, smoke, cheese, milk, hair cream

Match List I with List II LIST I &ndash; Enzymatic reaction LIST II - Enzyme A Sucrose&rarr; Glucose and Fructose I Zymase B Glucose &rarr; ethyl alcohol and CO _ 2 II Pepsin C

In figure, a straight line is given for Freundrich Adsorption ( y = 3x + 2 . 505 ) . The value of (1)/(n) and logK are respectively.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Amongst He, Ne, Ar and Kr ; 1g of activated charcoal adsorbs

Match List I with List II List I List II A Physisorption I Single Layer Adsorption B Chemisorption II 20 - 40kJ mol ^ - 1 C N _ 2 (g) + 3 H _ 2 (g) Fe ( s ) ⟶ 2 NH _ 3 (g) III

Adding surfactants in non polar solvent, the micelles structure will look like (a) (b) (c) (d)

The graph of log(x)/(m)vslogp for an adsorption process is a straight line inclined at an angle of 45 ° with intercept equal to 0 . 6020 . The mass of gas adsorbed per unit mass

Match List-I and List-II List-I List-II A. Osmosis I. Solvent molecules pass through semi permeable membrane towards solvent side. B. Reverse osmosis II. Movement of charged

Which of the following salt solutions would coagulate the colloid soloution formed when FeCl _ 3 is added to NaOH solution, at the fastest rate?

Based on the given figure, the number of correct statement/s is/are A. Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in

The number of incorrect statement/s from the following is/are A. Water vapours are adsorbed by anhydrous calcium chloride. B. There is a decrease in surface energy during

The number of statement/s which are the characteristics of physisorption is ___________. A. It is highly specific in nature B. Enthalpy of adsorption is high C. It decreases with

Statement I: For colloidal particles, the values of colligative properties are of small order as compared to values shown by true solutions at same concentration. Statement II

The correct option(s) related to adsorption processes is(are)

Given below are the critical temperatures of some of the gases: Gas Critical temperature (K) He 5 . 2 CH _ 4 190 CO _ 2 304 . 2 NH _ 3 405 . 5 The gas showing least adsorption on

100mL of 5 % (w / v) solution of NaCl in water was prepared in 250mL beaker. Albumin from the egg was poured into NaCl solution and stirred well. This resulted in a/ an

Among the following the number of curves not in accordance with Freundlich adsorption isotherm is

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Dissolved substances can be removed from a colloidal solution by

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Finest gold is red in colour, as the size of the particles

Match List - I with List - II. List &ndash;I (Processes/Reactions) List-II (Catalyst) A 2 SO _ 2 (g) + O _ 2 (g) → 2 SO _ 3 (g) I Fe (s) B 4 NH _ 3 (g) + 5 O _ 2 (g) → 4NO(g) + 6

For micelle formation, which of the following statements are correct? (A) Micelle formation is an exothermic process. (B) Micelle formation is an endothermic process. (C) The

42 . 12 % (w/v) solution of NaCl causes precipitation of a certain sol in 10 hours. The coagulating value of NaCl for the sol is [Given : Molar mass : Na = 23 . 0g mol ^ - 1 ; Cl

Which of the following is a correct statement?

Match List-I with List-II List-I List-II (A) negatively charged sol (I) Fe _ 2 O _ 3 · xH _ 2 O (B) macromolecular colloid (II) CdS sol (C) positively charged sol (III) Starch (D)

The Zeta potential is related to which property of colloids?

If the initial pressure of a gas is 0 . 03atm , the mass of the gas adsorbed per gram of the adsorbent is____ × 10 ^ - 2 g

Match List - I with List - II. List-I List-II A Lyophilic colloid I Liquid-liquid colloid B Emulsion II Protective colloid C Positively charged colloid III FeCl _ 3 + NaOH D

2 . 0g of H _ 2 gas is adsorbed on 2 . 5g of platinum powder at 300K and 1 bar pressure. The volume of the gas adsorbed per gram of the adsorbent is mL (Given : R = 0 . 083L bar K

Incorrect statement for Tyndall effect is

When 200mL of 0 . 2M acetic acid is shaken with 0 . 6g of wood charcoal, the final concentration of acetic acid after adsorption is 0 . 1M . The mass of acetic acid adsorbed per

Given below are two statements: Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing. Statement II : For stabilisation of

The correct statement (s) related to colloids is(are)

Match List - I with List - II . List- I (Colloid Preparation Method) List- II (Chemical Reaction) ( a ) Hydrolysis ( i ) 2 AuCl _ 3 + 3HCHO + 3 H _ 2 O → 2Au ( sol ) + 3HCOOH +

CH _ 4 is adsorbed on 1g charcoal at 0 ° C following the Freundlich adsorption isotherm. 10 . 0mL of CH _ 4 is adsorbed at 100mm of Hg, whereas 15 . 0mL is adsorbed at 200mm of Hg

Select the graph that correctly describes the adsorption isotherms at two temperatures T _ 1 and T _ 2 ( T _ 1 > T _ 2 ) for a gas : ( x - mass of the gas adsorbed m - - mass of

Lyophilic sols are more stable than lyophobic sols because:

Tyndall effect is more effectively shown by:

The sol given below with negatively charged colloidal particles is:

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A: SO _ 2 ( g ) is adsorbed to a large extent than H _ 2 ( g ) on

CO _ 2 gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO _ 2 adsorbed becomes 64 times when the pressure of CO _ 2

Match List I with List II : List-I List-II Example of colloids Classification (a) Cheese (i) dispersion of liquid in liquid (b) Pumice stone (ii) dispersion of liquid in gas (c)

When silver nitrate solution is added to potassium iodide solution then the sol produced is:

For coagulation of 50 mL of a sol, 10 mL of 0.5M Cl - ion solution is required. What is the coagulating value of Cl ^ - ion solution (Nearest integer) NOTE: NTA question has been

The conditions given below are in the context of observing Tyndall effect in colloidal solutions: (A) The diameter of the colloidal particles is comparable to the wavelength of

The charges on the colloidal CdS sol and TiO _ 2 sol are, respectively :

For the coagulation of a negative sol, the species below, that has the highest flocculating power is:

A colloidal system consisting of a gas dispersed in a solid is called a/an:

The INCORRECT statements below regarding colloidal solutions is :

The nature of charge on resulting colloidal particles when FeCl _ 3 is added to excess of hot water is:

3 . 12g of oxygen is adsorbed on 1 . 2g of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at 1atm and 300K in L is [R = 0 . 0821Latm K ^ - 1 mol ^ - 1 ]

Which one of the following statements is FALSE for hydrophilic sols?

In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption ((x)/(m)) is directly proportional to P ^ x . The value of x is :

Most suitable salt which can be used for efficient clotting of blood will be?

In Freundlich adsorption isotherm, slope of AB line is:

For Freundlich adsorption isotherm, a plot of log(x / m)(y - axis) and logp(x - axis) gives a straight line, the intercept and slope fo rthe line is 0 . 4771and2 , respectively.

Kraft temperature is the temperature:

Adsorption of a gas follows Freudlich adsorption isotherm. If x is the mass of the gas adsorbed on mass m of the adsorbent, the correct plot of (x)/(m) versus p is:

Identify the correct molecular picture showing what happens at the critical micellar concentration ( CMC ) of an aqueous solution of a surfactant

A sample of red ink (a colloidal suspension) is prepared by mixing eosine dye, egg white, HCHO and water. The component which ensures stability of the ink sample is :

Match the following: (i) Foam (a) smoke (ii) Gel (b) cell fluid (iii) Aerosol (c) jellies (iv) Emulsion (d) rubber (e) froth (f) milk

Tyndall effect is observed when :

Amongst the following statements regarding adsorption, those that are valid are: (a) becomes less negative as adsorption proceeds. (b) On a given adsorbent, ammonia is adsorbed

The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is _____. Gem stones, paints, smoke, cheese, milk, hair cream

Match List I with List II LIST I – Enzymatic reaction LIST II - Enzyme A Sucrose→ Glucose and Fructose I Zymase B Glucose → ethyl alcohol and CO _ 2 II Pepsin C

Match List - I with List - II. List –I (Processes/Reactions) List-II (Catalyst) A 2 SO _ 2 (g) + O _ 2 (g) → 2 SO _ 3 (g) I Fe (s) B 4 NH _ 3 (g) + 5 O _ 2 (g) → 4NO(g) + 6

The gold numbers of a few protective colloids are (A) Starch = 25 (B) Gelatin = 0.005 - 0.01 (C) Hemoglobin = 0.03 (D) Dextrin = 6 - 123. Which is the best protective colloid ?