Surface Chemistry Test

Result

Surface Chemistry Test - 3

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The substance that gets adsorbed on the surface of the solid is called

A
Micelle

B
Adsorbate

C
Adsorbent

D
Inner phase

Solution

In adsorption process, the molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate.
Question 2
1 / -0

Water vapours are adsorbed by

A
Anhydrous CaCl₂

B
Silica gel

C
Charcoal

D
Organic dye

Solution

Water vapours gets adsorbed by Silica gel, while absorbed by anhydrous calcium chloride.
Question 3
1 / -0

Adsorption is accompanied by

A
Decrease in entropy of the system

B
Decrease in enthalpy of the system

C
TΔS for the process is negative

D
All are correct

Solution

Adsorption is accompanied by decrease in enthalpy as well as decrease in entropy of the system. Adsorption, therefore, is invariably an exothermic process.
Question 4
1 / -0

The phenomenon in which adsorption and absorption takes place simultaneously is called

A
Sorption

B
Physiorption

C
Desorption

D
Chemisorption

Solution

Both adsorption and absorption can take place simultaneously also. The term sorption is used to describe both the processes.
Question 5
1 / -0

Which of the following is true about chemisorption?

A
It is reversible in nature

B
It is highly specific in nature

C
It usually occurs at low temperature

D
It results into multimolecular layers on adsorbent surface.

Solution

Chemisorption is highly specific in nature and it will occur only if there is some possibility of chemical bonding between adsorbent and adsorbate.
Question 6
1 / -0

Adsorption increases when

A
Temperature decreases

B
Temperature remains constant

C
Temperature may or may not change

D
Temperature increases

Solution

Adsorption is an exothermic process, it occurs more readily at lower temperatures and decreases with increase in temperature (Le-Chatelier's Principle).
Question 7
1 / -0

Which among the following is a property of physisorption?

A
Irreversibility

B
High enthalpy of adsorption

C
Non – specific in nature

D
All of these

Solution

In physical adsorption or physisorption, the force of attraction between adsorbent and adsorbate is weak van der Waals force. There is no chemical bond formation.
Question 8
1 / -0

Powdered substances are more effective adsorbents than their crystalline forms because

A
Surface area increases

B
Pressure increases

C
Temperature increases

D
All of these

Solution

Both physisorption and chemisorption increases with increase in surface area of the adsorbent. Surface area can be increased by powdering the adsorbent.
Question 9
1 / -0

Which among the following is true for chemisorption?

A
Occurs at low temperature

B
Irreversible in nature

C
Does not form surface complex

D
Heat of adsorption is low

Solution

In chemisorptions, the force of attraction between adsorbent and adsorbate is chemical bond.
Question 10
1 / -0

In physisorption, adsorption is generally

A
Bilayered

B
Includes no layer

C
Multilayered

D
Monolayered

Solution

Physiorption includes physical forces of attraction, hence, multilayered is possible.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Surface Chemistry Test - 3

Result

Surface Chemistry Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

Micelle

Adsorbate

Adsorbent

Inner phase

Solution

Question 2

Anhydrous CaCl2

Silica gel

Charcoal

Organic dye

Solution

Question 3

Decrease in entropy of the system

Decrease in enthalpy of the system

TΔS for the process is negative

All are correct

Solution

Question 4

Sorption

Physiorption

Desorption

Chemisorption

Solution

Question 5

It is reversible in nature

It is highly specific in nature

It usually occurs at low temperature

It results into multimolecular layers on adsorbent surface.

Solution

Question 6

Temperature decreases

Temperature remains constant

Temperature may or may not change

Temperature increases

Solution

Question 7

Irreversibility

High enthalpy of adsorption

Non – specific in nature

All of these

Solution

Question 8

Surface area increases

Pressure increases

Temperature increases

All of these

Solution

Question 9

Occurs at low temperature

Irreversible in nature

Does not form surface complex

Heat of adsorption is low

Solution

Question 10

Bilayered

Includes no layer

Multilayered

Monolayered

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

Anhydrous CaCl₂