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Surface Chemistry · Chemistry · JEE Main

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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 4th April Evening Shift
The adsorbent used in adsorption chromatography is/are - A. silica gel B. alumina C. quick lime D. magnesia Choose the most appropriate answer from th...
JEE Main 2024 (Online) 31st January Morning Shift
'Adsorption' principle is used for which of the following purification method?
JEE Main 2023 (Online) 13th April Evening Shift
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 particle...
JEE Main 2023 (Online) 13th April Morning Shift
What happens when a lyophilic sol is added to a lyophobic sol?
JEE Main 2023 (Online) 12th April Morning Shift
Four gases A, B, C and D have critical temperatures $$5.3,33.2,126.0$$ and $$154.3 \mathrm{~K}$$ respectively. For their adsorption on a fixed amount ...
JEE Main 2023 (Online) 10th April Evening Shift
Ferric chloride is applied to stop bleeding because -
JEE Main 2023 (Online) 10th April Morning Shift
The enthalpy change for the adsorption process and micelle formation respectively are
JEE Main 2023 (Online) 8th April Morning Shift
Which of the following represent the Freundlich adsorption isotherms? Choose the correct answer from the options given below:...
JEE Main 2023 (Online) 1st February Evening Shift
In figure, a straight line is given for Freundrich Adsorption ($$y=3x+2.505$$). The value of $$\frac{1}{n}$$ and $$\log \mathrm{K}$$ are respectively....
JEE Main 2023 (Online) 1st February Morning Shift
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A: Amongst $$\mathrm{He}, \mathrm{Ne}, ...
JEE Main 2023 (Online) 31st January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 31st January Morning Shift
Adding surfactants in non polar solvent, the micelles structure will look like ...
JEE Main 2023 (Online) 30th January Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In expensive scientific ins...
JEE Main 2023 (Online) 29th January Evening Shift
Match List I and List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:...
JEE Main 2023 (Online) 29th January Morning Shift
Which of the following salt solutions would coagulate the colloid solution formed when $$\mathrm{FeCl_3}$$ is added to $$\mathrm{NaOH}$$ solution, at ...
JEE Main 2023 (Online) 25th January Morning Shift
The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph : ...
JEE Main 2023 (Online) 24th January Morning Shift
Statement I : For colloidal particles, the values of colligative properties are of small order as compared to values shown by true solutions at same c...
JEE Main 2022 (Online) 29th July Evening Shift
Given below are the critical temperatures of some of the gases: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-st...
JEE Main 2022 (Online) 29th July Morning Shift
$$100 \mathrm{~mL}$$ of $$5 \%\,(\mathrm{w} / \mathrm{v})$$ solution of $$\mathrm{NaCl}$$ in water was prepared in $$250 \mathrm{~mL}$$ beaker. Albumi...
JEE Main 2022 (Online) 28th July Morning Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
JEE Main 2022 (Online) 27th July Evening Shift
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...
JEE Main 2022 (Online) 26th July Evening Shift
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 t...
JEE Main 2022 (Online) 25th July Evening Shift
For micelle formation, which of the following statements are correct? A. Micelle formation is an exothermic process. B. Micelle formation is an endoth...
JEE Main 2022 (Online) 30th June Morning Shift
TLC analysis of a mixture having 3 components (A, B, C) using silica gel as the stationary phase gave following Rf values; for A = 0.72, B = 0.48, C =...
JEE Main 2022 (Online) 29th June Evening Shift
A 42.12% (w/v) solution of NaCl causes precipitation of a certain sol in 10 hours. The coagulating value of NaCl for the sol in 2 hours is : [Given : ...
JEE Main 2022 (Online) 29th June Morning Shift
Which of the following is a correct statement?
JEE Main 2022 (Online) 28th June Evening Shift
Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-...
JEE Main 2022 (Online) 28th June Morning Shift
The Zeta potential is related to which property of colloids?
JEE Main 2022 (Online) 27th June Morning Shift
Match List-I with List-II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2022 (Online) 25th June Morning Shift
Incorrect statement for Tyndall effect is :
JEE Main 2022 (Online) 25th June Morning Shift
Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because :
JEE Main 2022 (Online) 24th June Morning Shift
Given below are two statements : Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing. Stateme...
JEE Main 2021 (Online) 1st September Evening Shift
Match List - I with List - II : Choose the most appropriate answer from the options given below....
JEE Main 2021 (Online) 31st August Morning Shift
Select the graph that correctly describes the adsorption isotherms at two temperatures T1, and T2 (T1 > T2) for a gas :(x - mass of the gas absorbe...
JEE Main 2021 (Online) 27th August Evening Shift
Lyophilic sols are more stable than lyophobic sols because :
JEE Main 2021 (Online) 27th August Morning Shift
Tyndall effect is more effectively shown by :
JEE Main 2021 (Online) 26th August Evening Shift
The sol given below with negatively charged colloidal particles is :
JEE Main 2021 (Online) 26th August Morning Shift
Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?
JEE Main 2021 (Online) 25th July Evening Shift
Match List I with List II : List-IExample of colloids List - IIClassification (a) Cheese (i) dispersion of liquid in liqui...
JEE Main 2021 (Online) 20th July Morning Shift
The conditions given below are in the context of observing Tyndall effect in colloidal solutions :(A) The diameter of the colloidal particles is compa...
JEE Main 2021 (Online) 18th March Evening Shift
The charges on the colloidal CdS sol and TiO2 sol are, respectively :
JEE Main 2021 (Online) 17th March Evening Shift
For the coagulation of a negative sol, the species below, that has the highest flocculating power is :
JEE Main 2021 (Online) 17th March Morning Shift
A colloidal system consisting of a gas dispersed in a solid is called a/an :
JEE Main 2021 (Online) 16th March Evening Shift
The INCORRECT statements below regarding colloidal solutions is :
JEE Main 2021 (Online) 26th February Evening Shift
The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is :
JEE Main 2021 (Online) 25th February Evening Shift
Which one of the following statements is FALSE for hydrophilic sols?
JEE Main 2021 (Online) 25th February Morning Shift
In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption $$\left( {{x \over m}} \right)$$ is directly proportional to Px. The ...
JEE Main 2021 (Online) 24th February Evening Shift
Most suitable salt which can be used for efficient clotting of blood will be :
JEE Main 2021 (Online) 24th February Morning Shift
In Freundlich adsorption isotherm, slope of AB line is : ...
JEE Main 2020 (Online) 6th September Morning Slot
Kraft temperature is the temperature :
JEE Main 2020 (Online) 5th September Evening Slot
Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed on mass m of the adsorbent, the correct plot of $${x ...
JEE Main 2020 (Online) 5th September Morning Slot
Identify the correct molecular picture showing that happens at the critical micellar concentration (CMC) of an aqueous solution of a surfactant ( ◍ po...
JEE Main 2020 (Online) 4th September Evening Slot
A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The component which ensures stability of the ...
JEE Main 2020 (Online) 4th September Morning Slot
Match the following : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Ari...
JEE Main 2020 (Online) 3rd September Evening Slot
An ionic micelle is formed on the addition of :
JEE Main 2020 (Online) 3rd September Morning Slot
Tyndall effect is observed when:
JEE Main 2020 (Online) 2nd September Evening Slot
Amongst the following statements regarding adsorption, those that are valid are (a) $$\Delta $$H becomes less negative as adsorption proceeds (b) On a...
JEE Main 2020 (Online) 2nd September Morning Slot
Which of the following is used for the preparation of colloids?
JEE Main 2020 (Online) 9th January Evening Slot
A mixture of gases O2, H2 and CO are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with ti...
JEE Main 2020 (Online) 8th January Evening Slot
For the following Assertion and Reason, the correct option is Assertion : For hydrogenation reactions, the catalytic activity increases from Group 5 t...
JEE Main 2020 (Online) 8th January Morning Slot
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :
JEE Main 2019 (Online) 12th April Evening Slot
Among the following, the INCORRECT statement about colloids is :
JEE Main 2019 (Online) 12th April Morning Slot
Peptization is a :
JEE Main 2019 (Online) 10th April Evening Slot
The correct option among the following is :
JEE Main 2019 (Online) 10th April Morning Slot
A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation $${x \over m} = k{p^{0.5}}$$ Adsorption...
JEE Main 2019 (Online) 9th April Morning Slot
The aerosol is a kind of colloid in which :
JEE Main 2019 (Online) 9th April Morning Slot
Match the catalysts (Column I) with products (Column II). .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-...
JEE Main 2019 (Online) 8th April Morning Slot
Adsorption of a gas follows freundlich adosorbed isotherm. x is the mass of the gas adsorbed on mass m of the adsorbent. The plot log $$x \over m$$ ve...
JEE Main 2019 (Online) 12th January Evening Slot
Among the following the false statement is -
JEE Main 2019 (Online) 12th January Morning Slot
Given .tg {border-collapse:collapse;border-spacing:0;border:none;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style...
JEE Main 2019 (Online) 11th January Evening Slot
Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :
JEE Main 2019 (Online) 11th January Morning Slot
An example of solid sol is :
JEE Main 2019 (Online) 10th January Evening Slot
Haemoglobin and gold sol are examples of :
JEE Main 2019 (Online) 10th January Morning Slot
Which of the following is not an example of heterogenous catalytic reaction?
JEE Main 2019 (Online) 9th January Evening Slot
For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?
JEE Main 2019 (Online) 9th January Morning Slot
Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressu...
JEE Main 2018 (Online) 16th April Morning Slot
Which one of the following is not a property of physical adsorption?
JEE Main 2018 (Online) 15th April Evening Slot
If x gram of gas is adsorbed by m gram of adsorbent at pressure P, the plot of log $${x \over m}$$ versus log P is linear. The slope of the plot is : ...
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following statements about colloids is False ?
JEE Main 2017 (Online) 9th April Morning Slot
Adsorption of a gas on a surface follows Freundlich adsorption isotherm. Plot of log $${x \over m}$$ versus log p gives a straight line with slope equ...
JEE Main 2017 (Online) 8th April Morning Slot
Among the following, correct statement is :
JEE Main 2017 (Offline)
The Tyndall effect is observed only when following conditions are satisfied: (a) The diameter of the dispersed particles is much smaller than the wave...
JEE Main 2016 (Online) 10th April Morning Slot
Gold numbers of some colloids are : Gelatin : 0.005 - 0.01, Gum Arabic : 0.15 - 0.25; Oleate : 0.04 - 1.0; Starch : 15 - 25. Which among these is a be...
JEE Main 2016 (Online) 9th April Morning Slot
A particular adsorption process has the following characteristics : (i) It arises due to van der Waals forces and (ii) it is reversible. Identify the ...
JEE Main 2016 (Online) 9th April Morning Slot
The most appropriate method of making egg-albumin sol is :
JEE Main 2016 (Offline)
For a linear plot of log (x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct ? (k and n are constants...
JEE Main 2015 (Offline)
3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrat...
JEE Main 2013 (Offline)
The coagulating power of electrolytes having ions Na+, Al3+ and Ba2+ for arsenic sulphide sol increases in the order: ...
AIEEE 2012
According to Freundlich adsorption isotherm, which of the following is correct ?
AIEEE 2009
Which of the following statements is incorrect regarding physisorptions ?
AIEEE 2008
Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is
AIEEE 2006
In Langmuir’s model of adsorption of a gas on a solid surface
AIEEE 2005
The volume of a colloidal particle, VC as compared to the volume of a solute particle in a true solution VS, could be
AIEEE 2005
The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively, which of the following sta...
AIEEE 2003
Which one of the following characteristics is not correct for physical adsorption?
AIEEE 2002
The formation of gas at the surface of tungsten due to adsorption is the reaction of order :
AIEEE 2002
Alum helps in purifying water by :

Numerical

JEE Main 2023 (Online) 15th April Morning Shift
$20 \mathrm{~mL}$ of $0.5 \mathrm{M} ~\mathrm{NaCl}$ is required to coagulate $200 \mathrm{~mL}$ of $\mathrm{As}_{2} \mathrm{S}_{3}$ solution in 2 hou...
JEE Main 2023 (Online) 11th April Evening Shift
The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is __________ A. The catalyst is diffuse...
JEE Main 2023 (Online) 8th April Evening Shift
Coagulating value of the electrolytes $$\mathrm{AlCl}_{3}$$ and $$\mathrm{NaCl}$$ for $$\mathrm{As}_{2} \mathrm{S}_{3}$$ are 0.09 and 50.04 respective...
JEE Main 2023 (Online) 6th April Evening Shift
The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ___________. Gem stones, paints, smoke, chee...
JEE Main 2023 (Online) 6th April Morning Shift
For the adsorption of hydrogen on platinum, the activation energy is $$30 ~\mathrm{k} ~\mathrm{J} \mathrm{mol}^{-1}$$ and for the adsorption of hydrog...
JEE Main 2023 (Online) 30th January Evening Shift
The graph of $\log \frac{x}{m}$ vs $\log \mathrm{p}$ for an adsorption process is a straight line inclined at an angle of $45^{\circ}$ with intercept ...
JEE Main 2023 (Online) 25th January Evening Shift
Based on the given figure, the number of correct statement/s is/are __________. A. Surface tension is the outcome of equal attractive and repulsive f...
JEE Main 2023 (Online) 25th January Evening Shift
The number of incorrect statement/s from the following is/are ___________ A. Water vapours are adsorbed by anhydrous calcium chloride. B. There is a d...
JEE Main 2023 (Online) 24th January Evening Shift
The number of statement/s which are the characteristics of physisorption is __________ A. It is highly specific in nature B. Enthalpy of adsorption is...
JEE Main 2022 (Online) 28th July Evening Shift
Among the following the number of curves not in accordance with Freundlich adsorption isotherm is ________. (a) (b) (c) (d) ...
JEE Main 2022 (Online) 30th June Morning Shift
100 mL of 0.3 M acetic acid is shaken with 0.8 g of wood charcoal. The final concentration of acetic acid in the solution after adsorption is 0.125 M....
JEE Main 2022 (Online) 27th June Evening Shift
If the initial pressure of a gas is 0.03 atm, the mass of the gas adsorbed per gram of the adsorbent is ___________ $$\times$$ 10$$-$$2 g....
JEE Main 2022 (Online) 24th June Evening Shift
When 200 mL of 0.2 M acetic acid is shaken with 0.6 g of wood charcoal, the final concentration of acetic acid after adsorption is 0.1 M. The mass of ...
JEE Main 2021 (Online) 31st August Evening Shift
CH4 is absorbed on 1g charcoal at 0$$^\circ$$C following the Freundlich adsorpiton isotherm 10.0 mL of CH4 is adsorbed at 100 mm of Hg, whereas 15.0 m...
JEE Main 2021 (Online) 27th July Morning Shift
CO2 gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO2 adsorbed becomes 64 times when t...
JEE Main 2021 (Online) 20th July Evening Shift
100 ml of 0.0018% (w/v) solution of Cl$$-$$ ion was the minimum concentration of Cl$$-$$ required to precipitate a negative sol in one h. The coagulat...
JEE Main 2020 (Online) 6th September Evening Slot
For Freundlich adsorption isotherm, a plot of log (x/m) (y-axis) and log p (x-axis) gives a straight line. The intercept and slope for the line is 0.4...
JEE Main 2020 (Online) 2nd September Morning Slot
The mass of gas adsorbed, x, per unit mass of adsorbate, m, was measured at various pressures, p. A graph between $$\log {x \over m}$$ and log p give...
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