Surface Chemistry Practice Questions
NEET · Chemistry · 1504 free MCQs with instant results and detailed explanations.
1504
Total
313
Easy
677
Medium
514
Hard
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Topics in Surface Chemistry
Catalysis
384
Adsorption
365
Emulsions
376
Colloids
379
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 statements correctly defines adsorption?
A.
It is the process of molecules adhering to a surface.
B.
It is the process of molecules dissolving in a solvent.
C.
It is the process of gas escaping from a liquid.
D.
It is the process of molecules diffusing through a membrane.
Show Answer & Explanation
Correct Answer: A
Adsorption specifically refers to the process where molecules adhere to the surface of a solid or liquid, distinguishing it from other processes like absorption.
Q2
Easy
Which of the following is an example of physisorption?
A.
Adsorption of nitrogen gas on activated charcoal.
B.
Adsorption of hydrogen on platinum.
C.
Adsorption of water on silica gel.
D.
Adsorption of ions on a membrane.
Show Answer & Explanation
Correct Answer: A
Physisorption involves weak Van der Waals forces, commonly seen in the adsorption of nitrogen on activated charcoal, while other examples involve stronger chemical bonds.
Q3
Easy
What is the role of a catalyst in adsorption processes?
A.
Increases the temperature of the reaction.
B.
Provides an alternative pathway with lower activation energy.
C.
Increases the concentration of reactants.
D.
Decreases the pressure in the system.
Show Answer & Explanation
Correct Answer: B
A catalyst provides an alternative reaction pathway with lower activation energy, facilitating the adsorption process and enhancing reaction rates.
Q4
Medium
Which of the following factors does NOT influence the adsorption of gases on solids?
A.
Surface area of the solid
B.
Nature of the gas
C.
Temperature of the gas
D.
Density of the solid
Show Answer & Explanation
Correct Answer: D
The density of the solid does not directly impact the adsorption process compared to surface area, nature of gas, and temperature, which are critical factors.
Q5
Medium
The Langmuir isotherm equation is given by which of the following expressions?
A.
P = (P0 * b) / (1 + bP)
B.
P = (b * V) / (1 - bV)
C.
V = (P0 * b) / (1 + bP)
D.
V = (P * V0) / (1 + P0)
Show Answer & Explanation
Correct Answer: A
The Langmuir isotherm equation describes the relationship between pressure and adsorption, accurately represented by P = (P0 * b) / (1 + bP).
Q6
Medium
In the Freundlich adsorption isotherm, which term indicates the degree of adsorption?
A.
k
B.
1/n
C.
n
D.
T
Show Answer & Explanation
Correct Answer: B
In the Freundlich equation, the term 1/n reflects the intensity of adsorption; lower values of n indicate stronger adsorption.
Q7
Medium
Which of the following is a characteristic feature of physisorption?
A.
Reversible
B.
High specificity
C.
Strong chemical bond
D.
Occurs at high temperatures
Show Answer & Explanation
Correct Answer: A
Physisorption is typically characterized by weak van der Waals forces, making it a reversible process compared to chemisorption.
Q8
Hard
Which of the following statements correctly describes the Freundlich adsorption isotherm?
A.
It assumes a fixed number of adsorption sites.
B.
It is applicable only for monolayer adsorption.
C.
It indicates adsorption decreases with pressure.
D.
It describes a heterogeneous surface adsorption process.
Show Answer & Explanation
Correct Answer: D
The Freundlich adsorption isotherm is used to describe adsorption on heterogeneous surfaces, where the energy of adsorption varies with the surface coverage.
Q9
Hard
A gas is adsorbed on a solid surface and its adsorption follows the Langmuir isotherm. If the maximum adsorption capacity is 0.5 mol/g and the equilibrium constant is 2 L/mol, what will be the amount of gas adsorbed at 0.1 mol/L concentration?
A.
0.1 mol/g
B.
0.2 mol/g
C.
0.25 mol/g
D.
0.3 mol/g
Show Answer & Explanation
Correct Answer: C
Using the Langmuir isotherm equation: θ = (bC) / (1 + bC), with b = 2 and C = 0.1, we find θ = 0.2. The amount adsorbed is 0.2 * 0.5 = 0.25 mol/g.
Q10
Hard
In a laboratory experiment, a certain adsorbent was found to have a higher adsorption capacity for gas A compared to gas B. Which of the following factors could contribute to this observation?
A.
Gas A has a larger molecular size than gas B.
B.
Gas B has stronger van der Waals forces than gas A.
C.
Gas A has a higher critical temperature than gas B.
D.
Gas A is more polar than gas B.
Show Answer & Explanation
Correct Answer: C
A higher critical temperature of gas A means it is less likely to be in gaseous form at a given temperature, leading to more effective adsorption on the adsorbent compared to gas B.
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Surface Chemistry — NEET Chemistry Practice Questions Online
This page contains 1504 practice MCQs for the chapter Surface Chemistry in NEET Chemistry. The questions are organized by difficulty — 313 easy, 677 medium, 514 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.