Surface Chemistry Test

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Surface Chemistry Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Chemisorption

A
Involves the weak attractive interactions between adsorbent and adsorbate

B
Is irreversible in nature

C
Decreases with increase of temperature

D
Involves multilayer formation of adsorbent on adsorbate

Solution

Chemical adsorption is irreversible due to formation of new bonds and compounds.
Question 2
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Chemisorption

A
Increases with temperature

B
Decreases with temperature

C
Remains unaffected by change of temperature

D
Either increases or decreases with temperature

Solution

Chemical adsorption increases with temperature.
Question 3
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When the temperature is raised, the viscosity of liquid decreases, this is because

A
Decreased volume of the solution

B
Increase in temperature increases the average kinetic energy of molecules, which overcome the attractive force between them

C
Decreased covalent and hydrogen bond forces

D
Increased attraction between molecules

Solution

When the temperature is raised, the viscosity of liquid decreases, this is because increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them.
Question 4
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The charge on As₂S₃sol is due to the adsorbed

A
H⁺

B
OH^-

C
O^2-

D
S^2-

Solution

Charge on As₂S₃sol is due to the adsorbed sulphide ion.
Question 5
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According to Langmuir adsorption isotherm, the amount of gas adsorbed at very high pressures

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

According to langmuir Adsorption isotherm the amount of gas adsorbed at very high pressures reaches a constant limiting volume.
Question 6
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In adsorption of oxalic acid on activated charcoal, the activated charcoal is known as

A
Adsorbent

B
Absorbate

C
Adsorber

D
Absorber

Solution

According to definition of adsorbent.
Question 7
1 / -0

Adsorption increase when

A
Temperature increases

B
Temperature decreases

C
Temperature remains constant

D
None of these

Solution

Adsorption increase when temperature decreases (Adsorption ∝ 1/Temperature)
Question 8
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In chemical adsorption, how many layers are adsorbed

A
One

B
Two

C
Multi

D
Zero

Solution

In chemical adsorption, one layers are adsorbed.
Question 9
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The adsorption of a gas on a solid surface varies with pressure of the gas in which of the following manner

A
Fast → slow → independent of the pressure

B
Slow → fast → independent of the pressure

C
Independent of the pressure → Fast → slow

D
Independent of the pressure → slow→ fast

Solution

Adsorption of a gas on solid independent of the pressure start fast and after some time becomes slow.
Question 10
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Which of the following statements is not applicable to chemisorption

A
It is slow

B
It is irreversible

C
It is highly specific

D
It is independent of temperature

Solution

Chemisorption first increases and then decreases with temperature.

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Re-Attempt Weekly Quiz Competition

Surface Chemistry Test - 1

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Surface Chemistry Test - 1

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SHARING IS CARING

Question 1

Involves the weak attractive interactions between adsorbent and adsorbate

Is irreversible in nature

Decreases with increase of temperature

Involves multilayer formation of adsorbent on adsorbate

Solution

Question 2

Increases with temperature

Decreases with temperature

Remains unaffected by change of temperature

Either increases or decreases with temperature

Solution

Question 3

Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules, which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between molecules

Solution

Question 4

H+

OH-

O2-

S2-

Solution

Question 5

Reaches a constant limiting value

Goes on increasing with pressure

Goes on decreasing with pressure

Increases first and decreases later with pressure

Solution

Question 6

Adsorbent

Absorbate

Adsorber

Absorber

Solution

Question 7

Temperature increases

Temperature decreases

Temperature remains constant

None of these

Solution

Question 8

One

Two

Multi

Zero

Solution

Question 9

Fast → slow → independent of the pressure

Slow → fast → independent of the pressure

Independent of the pressure → Fast → slow

Independent of the pressure → slow→ fast

Solution

Question 10

It is slow

It is irreversible

It is highly specific

It is independent of temperature

Solution

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H⁺

OH^-

O^2-

S^2-