Surface Chemistry Practice Questions
JEE · Chemistry · 1402 free MCQs with instant results and detailed explanations.
1402
Total
285
Easy
606
Medium
511
Hard
Start Practicing Surface Chemistry
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Topics in Surface Chemistry
Colloids
301
Emulsions
235
Catalysis
309
Adsorption
299
Tyndall Effect
258
Sample Questions from Surface Chemistry
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary factor that affects the extent of adsorption in gases on solid surfaces?
A.
Surface area
B.
Color
C.
Pressure
D.
Temperature
Show Answer & Explanation
Correct Answer: A
The greater the surface area, the more active sites are available for adsorption, hence increasing the extent of adsorption.
Q2
Easy
Which of the following types of adsorption involves a weak van der Waals force?
A.
Chemical adsorption
B.
Physical adsorption
C.
Catalytic adsorption
D.
Reactive adsorption
Show Answer & Explanation
Correct Answer: B
Physical adsorption occurs through weak van der Waals forces, which are less strong than the covalent bonds in chemical adsorption.
Q3
Easy
Which of the following is a characteristic of chemisorption?
A.
Reversible
B.
Specific
C.
Low heat of adsorption
D.
Independent of surface area
Show Answer & Explanation
Correct Answer: B
Chemisorption is specific to particular adsorbates and involves the formation of strong bonds, making it a characteristic feature.
Q4
Medium
Which of the following statements regarding adsorption is correct?
A.
Adsorption is an exothermic process.
B.
Adsorption decreases with an increase in temperature.
C.
Adsorption is a bulk phenomenon.
D.
Adsorption is always irreversible.
Show Answer & Explanation
Correct Answer: A
Adsorption is typically an exothermic process because the adsorbate is stabilized on the surface, releasing energy in the process.
Q5
Medium
A gas is adsorbed onto a solid surface at a fixed temperature. If the pressure of the gas is doubled, what will happen to the amount of gas adsorbed according to the Langmuir adsorption model?
A.
The amount of gas adsorbed will also double.
B.
The amount of gas adsorbed will increase, but not double.
C.
The amount of gas adsorbed will remain the same.
D.
The amount of gas adsorbed will decrease.
Show Answer & Explanation
Correct Answer: B
According to the Langmuir model, the amount of gas adsorbed approaches a maximum value and is proportional to pressure at lower pressures, but the relationship is not linear as saturation is reached.
Q6
Medium
Which of the following statements about adsorption is correct?
A.
It is a bulk phenomenon.
B.
It involves the accumulation of molecules on a surface.
C.
It is always exothermic.
D.
It is independent of temperature.
Show Answer & Explanation
Correct Answer: B
Adsorption is the process where molecules adhere to a surface, resulting in a concentration of species at the interface.
Q7
Medium
Which factor does NOT affect the adsorption of gases on solids?
A.
Nature of adsorbate
B.
Surface area of the adsorbent
C.
Pressure of the adsorbate gas
D.
Color of the adsorbent
Show Answer & Explanation
Correct Answer: D
The color of the adsorbent does not influence its ability to adsorb gases, whereas other factors like surface area and pressure are significant.
Q8
Hard
Which of the following statements best describes the Freundlich adsorption isotherm?
A.
It applies only to monolayer adsorption.
B.
It is defined for multilayer adsorption on heterogeneous surfaces.
C.
It describes adsorption at constant temperature regardless of pressure.
D.
It suggests a linear relationship between the amount of gas adsorbed and pressure.
Show Answer & Explanation
Correct Answer: B
The Freundlich isotherm is applicable for multilayer adsorption on surfaces with heterogeneous energies, indicating different sites can have different affinities for the adsorbate.
Q9
Hard
Which of the following factors does NOT affect the adsorption of gases on solids?
A.
Nature of adsorbate and adsorbent
B.
Temperature of the system
C.
Pressure of the gas
D.
The volume of the adsorbent
Show Answer & Explanation
Correct Answer: D
The volume of the adsorbent does not influence the adsorption capacity directly; rather, the surface area and nature of the adsorbate and adsorbent, along with temperature and pressure, are key factors.
Q10
Hard
In the Langmuir adsorption isotherm, which assumption is made regarding the surface of the adsorbent?
A.
The surface has infinite sites for adsorption.
B.
Each adsorption site can hold multiple adsorbate molecules.
C.
Adsorption is limited to a single layer of molecules.
D.
Adsorption occurs randomly on a two-dimensional surface.
Show Answer & Explanation
Correct Answer: C
The Langmuir isotherm assumes monolayer adsorption, meaning each site can be occupied by only one molecule, and there are no further layers above it.
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Surface Chemistry — JEE Chemistry Practice Questions Online
This page contains 1402 practice MCQs for the chapter Surface Chemistry in JEE Chemistry. The questions are organized by difficulty — 285 easy, 606 medium, 511 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.