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JEE Main Surface Chemistry Practice Questions With Solutions

Updated By Diksha Sharma on 07 Jan, 2025 21:16

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JEE Main Chemistry Surface Chemistry Practice Questions

Mathematics Physics

Question 1.

The adsorbent used in adsorption chromatography is/are -

A. silica gel

B. alumina

C. quick lime

D. magnesia

Choose the most appropriate answer from the options given below :

A

C and D only

B

A only

C

B only

D

A and B only

Question 2.

'Adsorption' principle is used for which of the following purification method?

A

Chromatography

B

Sublimation

C

Distillation

D

Extraction

Question 3.

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 much smaller than wavelength of light to show Tyndall effect.

Reason R : The light scatters in all directions when the size of particles is large enough.

In the light of the above statements, choose the correct answer from the options given below:

A

Both A and R are correct and R is the correct explanation of A

B

A is true but R is false

C

Both A and R are correct but R is NOT the correct explanation of A

D

A is false but R is true

Question 4.

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

A

Film of lyophobic sol is formed over lyophilic sol.

B

Lyophilic sol is dispersed in lyophobic sol.

C

Film of lyophilic sol is formed over lyophobic sol.

D

Lyophobic sol is coagulated

Question 5.

Four gases A, B, C and D have critical temperatures $5.3, 33.2, 126.0$ and $154.3 K$ respectively. For their adsorption on a fixed amount of charcoal, the correct order is:

A

D > C > B > A

B

C > B > D > A

C

D > C > A > B

D

C > D > B > A

Question 6.

Ferric chloride is applied to stop bleeding because -

A

{FeCl}_{3}

reacts with the constituents of blood which is a positively charged sol.

B

Blood absorbs

{FeCl}_{3}

and forms a complex.

C

{Cl}^{-}

ions cause coagulation of blood.

D

{Fe}^{3 +}

ions coagulate blood which is a negatively charged sol.

Question 7.

The enthalpy change for the adsorption process and micelle formation respectively are

A

Δ H_{ads} > 0 and Δ H_{mic} < 0

B

Δ H_{ads} > 0 and Δ H_{mic} > 0

C

Δ H_{ads} < 0 and Δ H_{mic} < 0

D

Δ H_{ads} < 0 and Δ H_{mic} > 0

Question 8.

Which of the following represent the Freundlich adsorption isotherms?

JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Surface Chemistry Question 5 English 1

Choose the correct answer from the options given below:

A

B, C, D only

B

A, B only

C

A, B, D only

D

A, C, D only

Question 9.

In figure, a straight line is given for Freundrich Adsorption ( $y = 3 x + 2.505$ ). The value of $\frac{1}{n}$ and $\log K$ are respectively.

JEE Main 2023 (Online) 1st February Evening Shift Chemistry - Surface Chemistry Question 26 English

A

0.3 and log 2.505

B

3 and 2.505

C

3 and 0.7033

D

0.3 and 0.7033

Question 10.

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 $Kr$ ; 1 $g$ of activated charcoal adsorbs more of $Kr$ .

Reason R: The critical volume $V_{c} ({cm}^{3} {mol}^{- 1})$ and critical pressure $P_{c}$ (atm) is highest for Krypton but the compressibility factor at critical point $Z_{c}$ is lowest for Krypton.

In the light of the above statements, choose the correct answer from the options given below

A

Both A and R are true and R is the correct explanation of A

B

A is false but R is true

C

Both A and R are true but R is NOT the correct explanation of A

D

A is true but R is false

Question 1.

Match List I with List II

LIST I		LIST II
A.	Physisorption	I.	Single Layer Adsorption
B.	Chemisorption	II.	$20 - 40 kJ {mol}^{- 1}$
C.	$N_{2} (g) + 3 H_{2} (g) \overset{Fe (s)}{⟶} 2 {NH}_{3} (g)$	III.	Chromatography
D.	Analytical Application or Adsorption	IV.	Heterogeneous catalysis

Choose the correct answer from the options given below:

A

A - III, B - IV, C - I, D - II

B

A - II, B - III, C - I, D - IV

C

A - II, B - I, C - IV, D - III

D

A - IV, B - II, C - III, D - I

Question 2.

Adding surfactants in non polar solvent, the micelles structure will look like

JEE Main 2023 (Online) 31st January Morning Shift Chemistry - Surface Chemistry Question 23 English

A

d

B

a

C

c

D

b

Question 3.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In expensive scientific instruments, silica gel is kept in watch-glasses or in semipermeable membrane bags.

Reason (R) : Silica gel adsorbs moisture from air via adsorption, thus protects the instrument from water corrosion (rusting) and / or prevents malfunctioning.

In the light of the above statements, choose the correct answer from the options given below :

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

(A) is true but (R) is false

C

(A) is false but (R) is true

D

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Question 4.

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 colloidal particles under the influence of applied electric potential towards oppositely charged electrodes.
C.	Electro osmosis	III.	Solvent molecules pass through semi permeable membrane towards solution side.
D.	Electrophoresis	IV.	Dispersion medium moves in an electric field.

Choose the correct answer from the options given below :

A

A-III, B-I, C-IV, D-II

B

A-III, B-I, C-II, D-IV

C

A-I, B-III, C-IV, D-II

D

A-I, B-III, C-II, D-IV

Question 5.

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

A

10 mL of 0.15 mol dm

^{- 3}

CaCl

_{2}

B

10 mL of 0.2 mol dm

^{- 3}

AlCl

_{3}

C

10 mL of 0.1 mol dm

^{- 3}

Na

_{2}

SO

_{4}

D

10 mL of 0.1 mol dm

^{- 3}

Ca

_{3}

(PO

_{4}

)

_{2}

Question 6.

The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph :

JEE Main 2023 (Online) 25th January Morning Shift Chemistry - Surface Chemistry Question 16 English

A

(a)

B

(b)

C

(d)

D

(c)

Question 7.

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 : For colloidal particles, the potential difference between the fixed layer and the diffused layer of same charges is called the electrokinetic potential or zeta potential.

In the light of the above statements, choose the correct answer from the options given below

A

Both Statement I and Statement II are false

B

Statement I is true and Statement II is false

C

Both Statement I and Statement II are true

D

Statement I is false but Statement II is true

Question 8.

Given below are the critical temperatures of some of the gases:

Gas	Critical temperature (K)
He	5.2
CH $_{4}$	190.0
CO $_{2}$	304.2
NH $_{3}$	405.5

The gas showing least adsorption on a definite amount of charcoal is

A

He

B

CH

_{4}

C

CO

_{2}

D

NH

_{3}

Question 9.

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

A

Lyophilic sol

B

Lyophobic sol

C

Emulsion

D

Precipitate

Question 10.

Match List - I with List - II.

	List - I Reaction		List - II Catalyst
(A)	$4 N H_{3} (g) + 5 O_{2} (g) \to 4 N O (g) + 6 H_{2} O (g)$	(I)	$N O (g)$
(B)	$N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)$	(II)	$H_{2} S O_{4} (l)$
(C)	$C_{12} H_{22} O_{11} (a q) + H_{2} O (l) \to \underset{G l u \cos e}{C_{6} H_{12} O_{6}} + \underset{F r u c t o s e}{C_{6} H_{12} O_{6}}$	(III)	$P t (s)$
(D)	$2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g)$	(IV)	$F e (s)$

Choose the correct answer from the options given below :

A

(A) - (II), (B) - (III), (C) - (I), (D) - (IV)

B

(A) - (III), (B) - (II), (C) - (I), (D) - (IV)

C

(A) - (III), (B) - (IV), (C) - (II), (D) - (I)

D

(A) - (III), (B) - (II), (C) - (IV), (D) - (I)

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