Test: Adsorption - 1 | 12 Questions MCQ Test

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This mock test of Test: Adsorption - 1 for Chemistry helps you for every Chemistry entrance exam. This contains 12 Multiple Choice Questions for Chemistry Test: Adsorption - 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Adsorption - 1 quiz give you a good mix of easy questions and tough questions. Chemistry students definitely take this Test: Adsorption - 1 exercise for a better result in the exam. You can find other Test: Adsorption - 1 extra questions, long questions & short questions for Chemistry on EduRev as well by searching above.

QUESTION: 1

Adsorption is accompanied with:

A.
Decrease in entropy of system
B.
Decrease in enthalpy
C.
The value of ΔS. T is negative
D.
All of the above

Solution:

QUESTION: 2

For adsorption of gas on solid surface, the plots of log x/m vs. log P is linear with a slope equal to:

A.
K
B.
log K
C.
1/nK
D.
1/n ( n being interger)

Solution:

QUESTION: 3

Which statement is not correct:

A.
Physical adsorption is due to van der Waal’s forces
B.
Physical adsorption decreases at high temperature and low pressure
C.
Physical adsorption is reversible
D.
Adsorption energy for a chemical adsorption is generally lesser than that of physical adsorption

Solution:

QUESTION: 4

Which is correct in case of van der Waals’ adsorption:

A.
High temperature, low pressure
B.
Low temperature, high pressure
C.
Low temperature, low pressure
D.
High temperature, high pressure

Solution:

If the accumulation of gas on the surface of a solid occurs on account of weak van der Waals’ forces, the adsorption is termed as physical adsorption or physisorption.

Hence, Physisorption can also be called as Van der Waals adsorption.

Physical adsorption of a gas by a solid is generally reversible. We can say by Le-Chatelier's principle that more of gas is adsorbed when pressure is increased as the volume of the gas decreases and since the adsorption process is exothermic, the physical adsorption occurs readily at low temperature and decreases with increasing temperature.

So the correct case is when it is Low temperature and high pressure the Physisorption tends to happen.

QUESTION: 5

According to Langmuir adsorption isotherm the amount of gas adsorbed at very high pressure:

A.
Reaches a constant limiting value
B.
Goes on increasing with pressure
C.
Goes on decreasing with pressure
D.
Increases first and decreases later with pressure

Solution:

QUESTION: 6

Which characteristic is not correct for physical adsorption:

A.
Adsorption is spontaneous
B.
Both enthalpy and entropy change of adsorption are negative
C.
Adsorption on solid is reversible
D.
Adsorption increases with increase in temperature

Solution:

QUESTION: 7

Rate of physisorption increases with:

A.
Decrease in temperature
B.
Increase in temperature
C.
Decrease in pressure
D.
Decrease in surface area.

Solution:

QUESTION: 8

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then:

A.
H increases
B.
S increases
C.
G increases
D.
S decreases

Solution:

QUESTION: 9

Surface area available for adsorption per g of catalyst is called:

A.
Molar surface area
B.
Specific surface area
C.
Normal surface area
D.
Equivalent surface area.

Solution:

QUESTION: 10

Plots of log vs. log C showing a straight line parallel to X-axis reveals that:

A.
n = 0
B.
C.
C = 0
D.
log C = constant

Solution:

QUESTION: 11

The Langmuir adsorption isotherm is deduced using the assumption:

A.
The heat of adsorption varies with coverage
B.
The adsorbed molecules interact with each other
C.
The adsorption takes place in multi layer
D.
The adsorption sites are equivalent in their ability to adsorb the particles.

Solution:

QUESTION: 12

Adsorption of methane follows the Langmuir adsorption isotherm at 90K. If p = 1.896cm³g^-1bar^-1 and b = 0.146bar^-1. Calculate the value of θ.

A.
0.116 bar
B.
0.514 bar
C.
0.214 bar
D.
0.216 bar

Solution:

Given data
p = 1.896cm³g^-1 bar^-1
b = 0.146 bar^-1

Substitute in the corresponding equation

bioprocess-engineering-questions-answers-adsorption-q10

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Test: Adsorption - 1

12 Questions MCQ Test Physical Chemistry | Test: Adsorption - 1

Adsorption is accompanied with:

For adsorption of gas on solid surface, the plots of log x/m vs. log P is linear with a slope equal to:

Which statement is not correct:

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