Surface Chemistry Practice Questions
Class 12 · Chemistry · 2454 free MCQs with instant results and detailed explanations.
2454
Total
783
Easy
1228
Medium
443
Hard
Start Practicing Surface Chemistry
Take a timed quiz or customize your practice session
Topics in Surface Chemistry
Emulsions
620
Catalysis
653
Adsorption
638
Colloids
543
Sample Questions from Surface Chemistry
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following best describes the process of adsorption?
A.
The accumulation of molecules on a surface.
B.
The mixing of two liquids.
C.
The evaporation of a liquid.
D.
The diffusion of gas into a liquid.
Show Answer & Explanation
Correct Answer: A
Adsorption refers specifically to the process where molecules adhere to a solid or liquid surface, forming a film.
Q2
Easy
What is the primary factor that increases the rate of adsorption of gases on solid surfaces?
A.
Increasing temperature
B.
Decreasing pressure
C.
Increasing surface area
D.
Decreasing concentration
Show Answer & Explanation
Correct Answer: C
Increasing the surface area of the adsorbent allows for more gas molecules to interact with it, thus increasing the rate of adsorption.
Q3
Easy
Which type of adsorption involves a weak Van der Waals force?
A.
Physical adsorption
B.
Chemical adsorption
C.
Monolayer adsorption
D.
Multilayer adsorption
Show Answer & Explanation
Correct Answer: A
Physical adsorption is characterized by weak Van der Waals forces, making it easily reversible compared to chemical adsorption.
Q4
Medium
Which of the following is an example of physisorption?
A.
Adsorption of gases on charcoal
B.
Adsorption of water on silica gel
C.
Adsorption of oxygen on platinum
D.
Adsorption of hydrogen on palladium
Show Answer & Explanation
Correct Answer: A
Physisorption involves weak van der Waals forces and is typically reversible, such as gases on charcoal.
Q5
Medium
The Freundlich adsorption isotherm is best described as which of the following?
A.
Linear relationship between pressure and adsorption
B.
Logarithmic relationship between concentration and adsorption
C.
Exponential relationship involving temperature
D.
Direct proportionality at low pressures
Show Answer & Explanation
Correct Answer: B
The Freundlich isotherm describes a logarithmic relationship between the concentration of adsorbate and the amount adsorbed.
Q6
Medium
Which of the following factors affects the extent of adsorption?
A.
Temperature of the adsorbate
B.
Nature of the adsorbent
C.
Pressure of the system
D.
All of the above
Show Answer & Explanation
Correct Answer: D
All factors including temperature, nature of the adsorbent, and pressure affect the extent of adsorption.
Q7
Medium
Which type of adsorption involves strong chemical bonds?
A.
Physisorption
B.
Chemisorption
C.
Physiochemical adsorption
D.
Weak adsorption
Show Answer & Explanation
Correct Answer: B
Chemisorption involves the formation of strong chemical bonds between the adsorbate and the adsorbent.
Q8
Hard
Which of the following factors does NOT affect the extent of adsorption of a gas on a solid?
A.
Nature of the adsorbate
B.
Pressure of the gas
C.
Surface area of the adsorbent
D.
Molecular weight of the solvent
Show Answer & Explanation
Correct Answer: D
The molecular weight of the solvent does not influence the adsorption of a gas on a solid, as adsorption depends primarily on the gas and solid interactions.
Q9
Hard
In the Freundlich adsorption isotherm, which parameter indicates the degree of heterogeneity of the adsorbent surface?
A.
1/n
B.
K
C.
n
D.
a
Show Answer & Explanation
Correct Answer: A
In the Freundlich isotherm, the value of 1/n indicates the degree of heterogeneity; smaller values suggest higher heterogeneity.
Q10
Hard
If the adsorption of a gas follows the Langmuir isotherm, what will be the effect of doubling the pressure on the amount of gas adsorbed at constant temperature?
A.
Doubles the adsorption
B.
Increases adsorption by less than double
C.
No effect on adsorption
D.
Reduces adsorption
Show Answer & Explanation
Correct Answer: B
In the Langmuir isotherm, the adsorption increases with pressure but not linearly; it approaches a maximum value due to saturation.
Showing 10 of 2454 questions. Start a quiz to practice all questions with scoring and timer.
Practice All 2454 Questions →Other Class 12 Subjects
Surface Chemistry — Class 12 Chemistry Practice Questions Online
This page contains 2454 practice MCQs for the chapter Surface Chemistry in Class 12 Chemistry. The questions are organized by difficulty — 783 easy, 1228 medium, 443 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 4 topics, giving you comprehensive coverage of the entire chapter.