Surface Chemistry
116 Questions
Start JEE Mains Test
2021
Q51
JEE Mains
MCQ
14 Mar 2026
Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?
A.
$\Delta$H > 0, $\Delta$S > 0
B.
$\Delta$H > 0, $\Delta$S < 0
C.
$\Delta$H < 0, $\Delta$S < 0
D.
$\Delta$H < 0, $\Delta$S > 0
2021
Q52
JEE Mains
MCQ
14 Mar 2026
Match List I with List II :
Choose the most appropriate answer from the options given below
| List-I Example of colloids |
List - II Classification |
|---|---|
| (a) Cheese | (i) dispersion of liquid in liquid |
| (b) Pumice stone | (ii) dispersion of liquid in gas |
| (c) Hair cream | (iii) dispersion of gas in solid |
| (d) Cloud | (iv) dispersion of liquid in solid |
Choose the most appropriate answer from the options given below
A.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
B.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
C.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
D.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
2021
Q53
JEE Mains
MCQ
14 Mar 2026
When silver nitrate solution is added to potassium iodide solution then the sol produced is :
A.
AgI / I$-$
B.
AgI / Ag+
C.
KI / NO$_3^ - $
D.
AgNO3 / NO$_3^ - $
2021
Q54
JEE Mains
MCQ
14 Mar 2026
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 light used.
(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.
(C) The diameter of the colloidal particles is much larger than the wavelength of light used.
(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.
(E) The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below :
(A) The diameter of the colloidal particles is comparable to the wavelength of light used.
(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.
(C) The diameter of the colloidal particles is much larger than the wavelength of light used.
(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.
(E) The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below :
A.
(A) and (E) only
B.
(C) and (D) only
C.
(A) and (D) only
D.
(B) and (E) only
2021
Q55
JEE Mains
MCQ
14 Mar 2026
The charges on the colloidal CdS sol and TiO2 sol are, respectively :
A.
positive and positive
B.
positive and negative
C.
negative and negative
D.
negative and positive
2021
Q56
JEE Mains
MCQ
14 Mar 2026
For the coagulation of a negative sol, the species below, that has the highest flocculating power is :
A.
Na+
B.
Ba2+
C.
PO$_4^{3 - }$
D.
SO$_4^{2 - }$
2021
Q57
JEE Mains
MCQ
14 Mar 2026
A colloidal system consisting of a gas dispersed in a solid is called a/an :
A.
foam
B.
aerosol
C.
solid sol
D.
gel
2021
Q58
JEE Mains
MCQ
14 Mar 2026
The INCORRECT statements below regarding colloidal solutions is :
A.
The flocculating power of Al3+ is more than that of Na+.
B.
A colloidal solutions shows Brownian motion of colloidal particles.
C.
An ordinary filter paper can stop the flow of colloidal particles.
D.
A colloidal solutions shows colligative properties.
2021
Q59
JEE Mains
MCQ
14 Mar 2026
The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is :
A.
neutral
B.
sometimes positive and sometimes negative
C.
positive
D.
negative
2021
Q60
JEE Mains
MCQ
14 Mar 2026
Which one of the following statements is FALSE for hydrophilic sols?
A.
They do not require electrolytes for stability.
B.
The sols cannot be easily coagulated.
C.
These sols are reversible in nature.
D.
Their viscosity is of the order of that of H2O.
2021
Q61
JEE Mains
MCQ
14 Mar 2026
In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption $\left( {{x \over m}} \right)$ is directly proportional to Px. The value of x is :
A.
$\infty $
B.
zero
C.
1
D.
${{1 \over n}}$
2021
Q62
JEE Mains
MCQ
14 Mar 2026
Most suitable salt which can be used for efficient clotting of blood will be :
A.
Mg(HCO3)2
B.
NaHCO3
C.
FeCl3
D.
FeSO4
2021
Q63
JEE Mains
MCQ
14 Mar 2026
In Freundlich adsorption isotherm, slope of AB line is :
A.
${1 \over n}$ with $\left( {{1 \over n} = 0\,to\,1} \right)$
B.
n with (n, 0.1 to 0.5)
C.
$\log {1 \over n}$ with $\left( {n < 1} \right)$
D.
log n with (n > 1)
2021
Q64
JEE Mains
Numerical
14 Mar 2026
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 mL is adsorbed at 200 mm of Hg. The volume of CH4 adsorbed at 300 mm of Hg is 10x mL. The value of x is _________ $\times$ 10-2.
(Nearest integer) [Use log102 = 0.3010, log103 = 0.4771]
(Nearest integer) [Use log102 = 0.3010, log103 = 0.4771]
Correct Answer: 128
Explanation:
We know
${x \over m} = K{P^{1/n}}$; using (x $\propto$ V)
$ \Rightarrow {{10} \over 1} = K \times {(100)^{1/n}}$ ..... (1)
${{15} \over 1} = K \times {(200)^{1/n}}$ ..... (2)
${V \over 1} = K \times {(300)^{1/n}}$ ..... (3)
Divide
(2) / (1)
${{15} \over {10}} = {2^{1/n}}$
$\log \left( {{3 \over 2}} \right) = {1 \over n}\log 2$
${1 \over n} = {{\log 3 - log2} \over {\log 2}} = {{0.4771 - 0.3010} \over {0.3010}}$
${1 \over n} = 0.585$
Divide
(3) / (1)
${V \over {10}} = {3^{1/n}}$
$\log \left( {{V \over {10}}} \right) = {1 \over n}\log 3$
$\log \left( {{V \over {10}}} \right) = 0.585 \times 0.4771 = 0.2791$
${V \over {10}} = {10^{0.279}} \Rightarrow V = 10 \times {10^{0.279}}$
$ \Rightarrow V = {10^{1.279}} = {10^x}$
$\Rightarrow$ x = 1.279
$\Rightarrow$ x = 128 $\times$ 10$-$2 (Nearest integer)
${x \over m} = K{P^{1/n}}$; using (x $\propto$ V)
$ \Rightarrow {{10} \over 1} = K \times {(100)^{1/n}}$ ..... (1)
${{15} \over 1} = K \times {(200)^{1/n}}$ ..... (2)
${V \over 1} = K \times {(300)^{1/n}}$ ..... (3)
Divide
(2) / (1)
${{15} \over {10}} = {2^{1/n}}$
$\log \left( {{3 \over 2}} \right) = {1 \over n}\log 2$
${1 \over n} = {{\log 3 - log2} \over {\log 2}} = {{0.4771 - 0.3010} \over {0.3010}}$
${1 \over n} = 0.585$
Divide
(3) / (1)
${V \over {10}} = {3^{1/n}}$
$\log \left( {{V \over {10}}} \right) = {1 \over n}\log 3$
$\log \left( {{V \over {10}}} \right) = 0.585 \times 0.4771 = 0.2791$
${V \over {10}} = {10^{0.279}} \Rightarrow V = 10 \times {10^{0.279}}$
$ \Rightarrow V = {10^{1.279}} = {10^x}$
$\Rightarrow$ x = 1.279
$\Rightarrow$ x = 128 $\times$ 10$-$2 (Nearest integer)
2021
Q65
JEE Mains
Numerical
14 Mar 2026
CO2 gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO2 adsorbed becomes 64 times when the pressure of CO2 is doubled. The value of n in the Freundlich isotherm equation is ____________ $\times$ 10$-$2. (Round off to the Nearest Integer)
Correct Answer: 17
Explanation:
Freundlich isotherm;
${x \over m} = k.{p^{{1 \over n}}}$
Substituting values ;
$\left( {{{64} \over 1}} \right) = {\left( 2 \right)^{{1 \over n}}} \Rightarrow n = {1 \over 6} = 0.166$
$ \cong 17 \times {10^{ - 2}}$
${x \over m} = k.{p^{{1 \over n}}}$
Substituting values ;
$\left( {{{64} \over 1}} \right) = {\left( 2 \right)^{{1 \over n}}} \Rightarrow n = {1 \over 6} = 0.166$
$ \cong 17 \times {10^{ - 2}}$
2021
Q66
JEE Mains
Numerical
14 Mar 2026
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 coagulating value of Cl$-$ ion is _________ (Nearest integer)
Correct Answer: 1
Explanation:
Coagulation value The minimum concentration of electrolyte in millimoles required to cause coagulation of 1 L of colloidal solution.
Given, 0.0018 g Cl$-$ present in 100 mL solution
Coagulation value of Cl$-$ is $ = {{{{0.0018} \over {35.5}} \times {{10}^3}} \over {0.1}} = 0.5070 \simeq 1$
Given, 0.0018 g Cl$-$ present in 100 mL solution
Coagulation value of Cl$-$ is $ = {{{{0.0018} \over {35.5}} \times {{10}^3}} \over {0.1}} = 0.5070 \simeq 1$
2020
Q67
JEE Mains
MCQ
14 Mar 2026
Kraft temperature is the temperature :
A.
below which the aqueous solution of
detergents starts freezing.
B.
above which the formation of micelles takes
place.
C.
below which the formation of micelles takes
place.
D.
above which the aqueous solution of
detergents starts boiling.
2020
Q68
JEE Mains
MCQ
14 Mar 2026
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 ${x \over m}$ versus p is :
m of the adsorbent, the correct plot of ${x \over m}$ versus p is :
A.
B.
C.
D.
2020
Q69
JEE Mains
MCQ
14 Mar 2026
Identify the correct molecular picture showing
that happens at the critical micellar
concentration (CMC) of an aqueous solution of
a surfactant ( ◍ polar head; ∼ non-polar tail;
● water).
A.
(C)
B.
(A)
C.
(D)
D.
(B)
2020
Q70
JEE Mains
MCQ
14 Mar 2026
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 ink sample is :
A.
HCHO
B.
Water
C.
Eosin dye
D.
Egg white
2020
Q71
JEE Mains
MCQ
14 Mar 2026
Match the following :
| (i) Foam | (a) smoke |
|---|---|
| (ii) Gel | (b) cell fluid |
| (iii) Aerosol | (c) jellies |
| (iv) Emulsion | (d) rubber |
| (e) froth | |
| (f) Milk |
A.
(i)-(e), (ii)-(c), (iii)-(a), (iv)-(f)
B.
(i)-(d), (ii)-(b), (iii)-(a), (iv)-(e)
C.
(i)-(d), (ii)-(b), (iii)-(e), (iv)-(f)
D.
(i)-(b), (ii)-(c), (iii)-(e), (iv)-(d)
2020
Q72
JEE Mains
MCQ
14 Mar 2026
An ionic micelle is formed on the addition of :
A.
excess water to liquid
B.
excess water to liquid
C.
liquid diethyl ether to aqueous NaCl solution
D.
sodium stearate to pure toluene
2020
Q73
JEE Mains
MCQ
14 Mar 2026
Tyndall effect is observed when:
A.
The diameter of dispersed particles is similar to the wavelenght of light used.
B.
The diameter of dispersed particles is much smaller than the wavelength of light used.
C.
The diameter of dispersed particles is much larger than the wavelength of light used.
D.
The refractive index of dispersed phase is greater than that of the dispersion medium.
2020
Q74
JEE Mains
MCQ
14 Mar 2026
Amongst the following statements regarding
adsorption, those that are valid are
(a) $\Delta $H becomes less negative as adsorption proceeds
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases
(a) $\Delta $H becomes less negative as adsorption proceeds
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases
A.
(c) and (d)
B.
(a) and (b)
C.
(d) and (a)
D.
(b) and (c)
2020
Q75
JEE Mains
MCQ
14 Mar 2026
Which of the following is used for the
preparation of colloids?
A.
Van Arkel Method
B.
Bredig’s Arc Method
C.
Mond Process
D.
Ostwald Process
2020
Q76
JEE Mains
MCQ
14 Mar 2026
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 time is :
A.
B.
C.
D.
2020
Q77
JEE Mains
MCQ
14 Mar 2026
For the following Assertion and Reason, the
correct option is
Assertion : For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements.
Reason : The reactants are most strongly adsorbed on group 7-9 elements.
Assertion : For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements.
Reason : The reactants are most strongly adsorbed on group 7-9 elements.
A.
Both assertion and reason are true and
the reason is the correct explanation for
the assertion.
B.
The assertion is true, but the reason is false.
C.
Both assertion and reason are true but the
reason is not the correct explanation for the
assertion.
D.
Both assertion and reason are false.
2020
Q78
JEE Mains
MCQ
14 Mar 2026
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the
order :
A.
AICl3 > K3[Fe(CN)6] > K2CrO4 > KBr = KNO3
B.
K3[Fe(CN)6] < K2CrO4 < KBr = KNO3 = AlCl3
C.
K3[Fe(CN)6] < K2CrO4 < AlCl3 < KBr < KNO3
D.
K3[Fe(CN)6] > AlCl3 > K2CrO4 > KBr > KNO3
2020
Q79
JEE Mains
Numerical
14 Mar 2026
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 0.4771 and 2, respectively. The mass of
gas, adsorbed per gram of adsorbent if the
initial pressure is 0.04 atm, is ______ $ \times $ 10–4 g.
(log 3 = 0.4771)
(log 3 = 0.4771)
Correct Answer: 48
Explanation:
According to Freundlich adsorption isotherm, in the median range of pressure
${x \over m} \propto {P^{{1 \over n}}}$
$ \Rightarrow $ ${x \over m}$ = kP$^{{1 \over n}}$
taking log both sides, we get,
log${x \over m}$ = logk + ${1 \over n}$ logP
Here in graph between log${x \over m}$ and logP, slope is ${1 \over n}$ and intercepts = log k.
$ \therefore $ ${1 \over n}$ = 2 $ \Rightarrow $ n = ${1 \over 2}$
and log k = 0.4771 = log 3
$ \Rightarrow $ k = 3
$ \therefore $ ${x \over m}$ = 3P$^{{2}}$
So, mass of gas adsorbed per gram of adsorbent
= 3 $ \times $ (0.04)2
= 48 $ \times $ 10–4
${x \over m} \propto {P^{{1 \over n}}}$
$ \Rightarrow $ ${x \over m}$ = kP$^{{1 \over n}}$
taking log both sides, we get,
log${x \over m}$ = logk + ${1 \over n}$ logP
Here in graph between log${x \over m}$ and logP, slope is ${1 \over n}$ and intercepts = log k.
$ \therefore $ ${1 \over n}$ = 2 $ \Rightarrow $ n = ${1 \over 2}$
and log k = 0.4771 = log 3
$ \Rightarrow $ k = 3
$ \therefore $ ${x \over m}$ = 3P$^{{2}}$
So, mass of gas adsorbed per gram of adsorbent
= 3 $ \times $ (0.04)2
= 48 $ \times $ 10–4
2020
Q80
JEE Mains
Numerical
14 Mar 2026
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 gives a
straight line with slope equal to 2 and the intercept
equal to 0.4771. The value of
${x \over m}$
at a pressure of
4 atm is :
(Given log 3 = 0.4771)
(Given log 3 = 0.4771)
Correct Answer: 48
Explanation:
According to Freundlich adsorption isotherm, in the median range of pressure
${x \over m} \propto {P^{{1 \over n}}}$
$ \Rightarrow $ ${x \over m}$ = kP$^{{1 \over n}}$ ....(1)
taking log both sides, we get,
log${x \over m}$ = logk + ${1 \over n}$ logP
Here in graph between log${x \over m}$ and logP, slope is ${1 \over n}$ and intercepts = log k.
Given, log k = 0.4771 $ \Rightarrow $ k = 3
Slope ${1 \over n}$ = 2
put in eq. (1), ${x \over m}$ = 3 $ \times $ (4)2 = 48
${x \over m} \propto {P^{{1 \over n}}}$
$ \Rightarrow $ ${x \over m}$ = kP$^{{1 \over n}}$ ....(1)
taking log both sides, we get,
log${x \over m}$ = logk + ${1 \over n}$ logP
Here in graph between log${x \over m}$ and logP, slope is ${1 \over n}$ and intercepts = log k.
Given, log k = 0.4771 $ \Rightarrow $ k = 3
Slope ${1 \over n}$ = 2
put in eq. (1), ${x \over m}$ = 3 $ \times $ (4)2 = 48
2019
Q81
JEE Mains
MCQ
14 Mar 2026
Among the following, the INCORRECT statement about colloids is :
A.
The range of diameters of colloidal particles is between 1 and to 1000 nm
B.
they are larger than small molecules and have high molar mass
C.
They can scatter light
D.
The osmotic pressure of a colloidal solution is of higher order than the true solution at the same
concentration.
2019
Q82
JEE Mains
MCQ
14 Mar 2026
Peptization is a :
A.
process of converting soluble particles to form colloidal solution
B.
process of converting precipitate into colloidal solution
C.
process of bringing colloidal molecule into solution
D.
process of converting a colloidal solution into precipitate
2019
Q83
JEE Mains
MCQ
14 Mar 2026
The correct option among the following is :
A.
Addition of alum to water makes it unfit for drinking.
B.
Colloidal medicines are more effective because they have small surface area.
C.
Colloidal paraticles in lyophobic sols can be precipitated by electrophoresis.
D.
Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
2019
Q84
JEE Mains
MCQ
14 Mar 2026
A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation
${x \over m} = k{p^{0.5}}$
Adsorption of the gas increase with :
${x \over m} = k{p^{0.5}}$
Adsorption of the gas increase with :
A.
Decrease in p and increase in T
B.
Increase in p and decrease in T
C.
Decrease in p and decrease in T
D.
Increase in p and increase in T
2019
Q85
JEE Mains
MCQ
14 Mar 2026
Match the catalysts (Column I) with products
(Column II).
| Column I | Column II |
|---|---|
| (A) V2O5 | (i) Polyethylene |
| (B) TiCl4/Al(Me)3 | (ii) ethanal |
| (C) PdCl2 | (iii) H2SO4 |
| (D) Iron Oxide | (iv) NH3 |
A.
(A)-(iii); (B)-(i); (C)-(ii); (D)-(iv)
B.
(A)-(ii); (B)-(iii); (C)-(i); (D)-(iv)
C.
(A)-(iii); (B)-(iv); (C)-(i); (D)-(ii)
D.
(A)-(iv); (B)-(iii); (C)-(ii); (D)-(i)
2019
Q86
JEE Mains
MCQ
14 Mar 2026
The aerosol is a kind of colloid in which :
A.
solid is dispersed in gas
B.
gas is dispersed in solid
C.
gas is dispersed in liquid
D.
liquid is dispersed in water
2019
Q87
JEE Mains
MCQ
14 Mar 2026
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 $x \over m$ versus log p is shown in the given graph. $x \over m$ is
proportional to :
A.
p2/3
B.
p3
C.
p2
D.
p3/2
2019
Q88
JEE Mains
MCQ
14 Mar 2026
Among the following the false statement is -
A.
Lyophilic sol can be coagulated by adding an electrote
B.
Tyndall effect can be used to distinguish between a colloidal solution and a true solution
C.
It is possible to cause artificial rain by throwing electrified sand carrying charge opposite to the one on clouds from an aeroplane
D.
Latex is a colloidal solution of rubber particles which are positively charged
2019
Q89
JEE Mains
MCQ
14 Mar 2026
Given
On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal ?
| Gas | H2 | CH4 | CO2 | SO2 |
|---|---|---|---|---|
| Critical
Temperature / K |
33 | 190 | 304 | 630 |
On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal ?
A.
SO2
B.
CH4
C.
H2
D.
CO2
2019
Q90
JEE Mains
MCQ
14 Mar 2026
Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :
A.
C : liquid in solid ; M : liquid in liquid ; S : solid in gas
B.
C : liquid in solid ; M : liquid in solid ; S : solid in gas
C.
C : solid in liquid ; M : liquid in liquid ; S : gas in solid
D.
C : solid in liqid ; M : solid in liquid ; S : solid in gas
2019
Q91
JEE Mains
MCQ
14 Mar 2026
An example of solid sol is :
A.
Butter
B.
Hair cream
C.
Gem stones
D.
Paint
2019
Q92
JEE Mains
MCQ
14 Mar 2026
Haemoglobin and gold sol are examples of :
A.
positively charged sols
B.
negatively charged sols
C.
Positively and negatively charged sols, respectively
D.
negatively and positively charged sols, respectively
2019
Q93
JEE Mains
MCQ
14 Mar 2026
Which of the following is not an example of heterogenous catalytic reaction?
A.
Ostwald's process
B.
Combustion of coal
C.
Hydrogenation of vegetable oils
D.
Haber's process
2019
Q94
JEE Mains
MCQ
14 Mar 2026
For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?
A.
BaCl2
B.
AlCl3
C.
NaCl
D.
Na3PO4
2019
Q95
JEE Mains
MCQ
14 Mar 2026
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 pressure P. ${x \over m}$ is proportional to :
A.
P2
B.
P${^{{1 \over 4}}}$
C.
P${^{{1 \over 2}}}$
D.
P
2018
Q96
JEE Mains
MCQ
14 Mar 2026
Which one of the following is not a property of physical adsorption?
A.
Higher the pressure, mre the adsorption
B.
Lower the temperature, more the adsorption
C.
Greater the surface area, more the adsorption
D.
Unilayer adsorption ocurs
2018
Q97
JEE Mains
MCQ
14 Mar 2026
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 :
(n and k are constants and n > 1)
(n and k are constants and n > 1)
A.
2 k
B.
log k
C.
n
D.
${1 \over n}$
2018
Q98
JEE Mains
MCQ
14 Mar 2026
Which of the following statements about colloids is False ?
A.
Freezing point of colloidal solution is lower than true solution at same concentration of a solute.
B.
Colloidal particles can pass through ordinary filter paper.
C.
When silver nitrate solution is added to potassium iodide solution, a negatively charged colloidal solution is formed.
D.
When excess of electolyte is added to colloidal solution, colloidal particle will be precipitated.
2017
Q99
JEE Mains
MCQ
14 Mar 2026
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 equal to 0.5, then:
( ${x \over m}$ is the mass of the gas adsorbed per gram of adsorbent)
( ${x \over m}$ is the mass of the gas adsorbed per gram of adsorbent)
A.
Adsorption is independent of pressure.
B.
Adsorption is proportional to the pressure.
C.
Adsorption is proportional to the square root of pressure.
D.
Adsorption is proportional to the square of pressure.
2017
Q100
JEE Mains
MCQ
14 Mar 2026
Among the following, correct statement is :
A.
Brownian movement is more pronounced for smaller particles than for bigger–particles
B.
Sols of metal sulphides are lyophilic.
C.
Hardy Schulze law states that bigger the size of the ions, the greater is its
coagulating power.
D.
One would expect charcoal to adsorb chlorine more than hydrogen sulphide.