Chemistry Exam  >  Chemistry Tests  >  Adsorption, Surface Chemistry - Chemistry MCQ

Adsorption, Surface Chemistry - Chemistry MCQ


Test Description

20 Questions MCQ Test - Adsorption, Surface Chemistry

Adsorption, Surface Chemistry for Chemistry 2024 is part of Chemistry preparation. The Adsorption, Surface Chemistry questions and answers have been prepared according to the Chemistry exam syllabus.The Adsorption, Surface Chemistry MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Adsorption, Surface Chemistry below.
Solutions of Adsorption, Surface Chemistry questions in English are available as part of our course for Chemistry & Adsorption, Surface Chemistry solutions in Hindi for Chemistry course. Download more important topics, notes, lectures and mock test series for Chemistry Exam by signing up for free. Attempt Adsorption, Surface Chemistry | 20 questions in 60 minutes | Mock test for Chemistry preparation | Free important questions MCQ to study for Chemistry Exam | Download free PDF with solutions
Adsorption, Surface Chemistry - Question 1

Calculate in multiples of 10-13 how long a hydrogen atom will remain on the surface of a solid at 1000 K if the desorption activation energy is 15kJoule/mol. Assume that τ0=10−13 s.

Detailed Solution for Adsorption, Surface Chemistry - Question 1

Adsorption, Surface Chemistry - Question 2

The volume of gases NH3, CO2 and H2 gas adsorbed by 1 gm charcoal at 300 K lie in the order ?

Detailed Solution for Adsorption, Surface Chemistry - Question 2

More readily soluble and easily liquifiable gases such as NH3/HC1/C12 and SO2, are adsorbed more than H2/N2.
i.e.. adsorption
proportional to intemiolecular interaction,
proportional to molecular mass,
proportional to ease of liquidation,
proportional to 'a’.
proportional to ciitical temperature (Te.
Therefore, order of adsoiption of gases:
SO2 > NH3 > HC1 > CO2, > CH4 > CO > N2 > H2

1 Crore+ students have signed up on EduRev. Have you? Download the App
*Answer can only contain numeric values
Adsorption, Surface Chemistry - Question 3

The adsorption of a gas an a solid surface was found to follow a langmuir isotherm with K = 4 Pa-1 at a temp of 25 °C. The pressure of a gas required to achieve a fractional surface coverage of 90 % is _____________________________ (in Pa), (upto two decimal places)


Detailed Solution for Adsorption, Surface Chemistry - Question 3



Adsorption, Surface Chemistry - Question 4

Which of the following factor's influencing the adsorption? 

Adsorption, Surface Chemistry - Question 5

Following plot represents the varition of temperature T with pressure for a definite extent of adsorption (xin) is called

Adsorption, Surface Chemistry - Question 6

Which among the following statements are NOT collects w.r.t. adsorption of gases on a solid ?

Adsorption, Surface Chemistry - Question 7

Graph between log (x in) and log (P) is straight line at angle of 45° with intercept is 0.602 ?

The extent of adsorption (x in) at a pressure of 1 atm is 
 

Detailed Solution for Adsorption, Surface Chemistry - Question 7

According to Freundlich adsorption isotherm:

Adsorption, Surface Chemistry - Question 8

Which of the following animation 's are correct in which B .E .T equation reduced into Langmuir ?

Detailed Solution for Adsorption, Surface Chemistry - Question 8

B.E.T equation:


Adsorption, Surface Chemistry - Question 9

Which of the inherent assumption in the Langmuir model of surface adsorption are ?

Adsorption, Surface Chemistry - Question 10

Following is the varition of physical as adsoiption with temperature ?

Adsorption, Surface Chemistry - Question 11

Which of the following plot does not corresponds to the adsorption isotherm ?

Detailed Solution for Adsorption, Surface Chemistry - Question 11

Because:
(a) Amount of adsorption keeps on rising in each case with increase in pressure
E .g: Adsorptio n of Br2, on silica get at 80°C
(b) Multilayer physical adsorption on non-porous solid.
E.g: Adsorption of N, on silica gel.
(c) Langmuir type isotherm.
E.g: H2 and N2 adsorbed on charcoal at 180 °C.

Adsorption, Surface Chemistry - Question 12

The adsorption of a gas is described by the L angmuir adsorption isotherm with K = 0.3 kPa-1. A t a pressure of 0.2 kPa. the if actional coverage is

Detailed Solution for Adsorption, Surface Chemistry - Question 12

Adsorption, Surface Chemistry - Question 13

Which of the following expression are CORRECT ?

*Answer can only contain numeric values
Adsorption, Surface Chemistry - Question 14

At 273 K, N2 is absorbed on a niica surface. A plot of ( V in m3 and P in torr) gives a straight line with a slope equal to 2x 10-5 torr m-3 and intercept equivalent to Vm is equal to 4 x 10-8 m3. The ad solution coefficient is _____________________ x 1012 (torr-1) ( upto two decimal places)


Detailed Solution for Adsorption, Surface Chemistry - Question 14

As we know that.

Reverse the reactioin,



*Answer can only contain numeric values
Adsorption, Surface Chemistry - Question 15

At 273 K, H2 is absorbed on a mica surface. A plot of   vs P (V in m3 and P in Pa) gives a straight line with a slope equal to 2 cm-3 and intercept is 3x10-3 cm-3 Pa respectively. The adsorption coefficient is ____________________ x 103 Pa. (upto two decimal places)


Detailed Solution for Adsorption, Surface Chemistry - Question 15

From Langmuir isotherm.



*Answer can only contain numeric values
Adsorption, Surface Chemistry - Question 16

Calculate the adsorption of a dye on activated carbon at 25°C, where k = 0.025, n = 0.5 and C = 0.04.
Based on the Freundlich isotherm.


Detailed Solution for Adsorption, Surface Chemistry - Question 16

Given data n = 0.5 Kd = 0.025 C = 0.04 Substitute the values in the corresponding equation q = Kd C(1/n) q = (0.025) (0.04)(1/0.5) q = 0.040.

Adsorption, Surface Chemistry - Question 17

The time for which the oxygen atom remains adsorbed on a tungsten surface is 0.36 at 2550 K and 3.49 at 2360 K. Calculate the activation energy of desorption of oxygen atom.

Detailed Solution for Adsorption, Surface Chemistry - Question 17

From integrated Arrhenius type equation:

Adsorption, Surface Chemistry - Question 18

Ail organic fatty acid forms a surface film on water that obeys the two-Dimensional ideal gas law. If the surface tension lowering is 10 mNm-1 at 25°C. The surface area per adsorbed molecules is

Detailed Solution for Adsorption, Surface Chemistry - Question 18

Surface film pressure equation (π) = τ2RT
Surface excess concentration 
Therefore, π = surface tension. N = number of molecules.

Adsorption, Surface Chemistry - Question 19

An 18°C . the surface tension (γ) of an aqueous solution of butyric acid is represented by the equation γ = γ0 -29 .8 log( 19.64 c2 + 1 ) where γ0 is surface tension of water is 0.0073 Nm-1 and cis the bulk concentration of the solute. Using the Gibbs adsorption isotherm to estimate the surface excess of butyric acid at c2 is equal to 0.01 mol dm-3 

Detailed Solution for Adsorption, Surface Chemistry - Question 19



*Answer can only contain numeric values
Adsorption, Surface Chemistry - Question 20

The number of molecules of CETANOL absorbate of cross-section area 2.58 x 10-19 m2 can be observed on the surface of a spherical drop of dodecane of radius 17 .8 pm is ________________ x 104. (Round off to two decimal places)


Detailed Solution for Adsorption, Surface Chemistry - Question 20

Area = 2.58 x 10-19m2 (occupied by single molecules)
1= 17.8 nm= 17.8 x 10-9 m
Total surface area of docedane = 4 πr2
= 4 x 3.14 x (17.8 x 10-9)2
= 3.979 x 10-15 m2
Therefore, total surface area = Area occupied by single molecules x Number of molecules
3.979 x 10-15 = 2.58x 10-19 x Number of molecules
Number of molecules = 

Information about Adsorption, Surface Chemistry Page
In this test you can find the Exam questions for Adsorption, Surface Chemistry solved & explained in the simplest way possible. Besides giving Questions and answers for Adsorption, Surface Chemistry, EduRev gives you an ample number of Online tests for practice
Download as PDF