Chapter Exam

Unit 4: Surface Chemistry — Online MCQ Test

Q: Which of the following is an example of physisorption?

Answer: B. Adsorption of nitrogen on charcoal — Physisorption occurs due to weak van der Waals forces, and gases like nitrogen are physically adsorbed on charcoal. Hydrogen on nickel and oxygen on platinum are examples of chemisorption.

Q: The Freundlich adsorption isotherm is represented by which of the following equations?

Answer: B. x/m = kP^(1/n) — According to Freundlich adsorption isotherm, the amount adsorbed per unit mass of adsorbent is proportional to pressure raised to a power. The equation is x/m = kP^(1/n).

Q: Adsorption generally decreases with increase in temperature because:

Answer: B. Adsorption is usually exothermic — Adsorption usually releases heat, so it is an exothermic process. Increasing temperature shifts the equilibrium toward desorption, reducing adsorption.

Q: The adsorption of a gas on a solid surface is found to increase sharply at low pressure and then gradually reach a maximum. This behavior is best described by:

Answer: B. Freundlich adsorption isotherm — Freundlich adsorption isotherm explains the increase in adsorption with pressure and the tendency to approach saturation at higher pressure. It fits experimental adsorption data well over a limited range.

CHEMISTRY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Unit 4: Surface Chemistry with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR CHEMISTRY. This chapter covers: Focusing on interface phenomena this chapter covers physisorption chemisorption Freundlich adsorption isotherm homogeneous heterogeneous catalysis enzyme kinetics colloids preparat.... AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Unit 4: Surface Chemistry — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR CHEMISTRY — Unit 4: Surface Chemistry, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is an example of physisorption?

A. Adsorption of hydrogen on nickel
B. Adsorption of nitrogen on charcoal ✓
C. Oxidation of sulfur dioxide on vanadium pentoxide
D. Adsorption of oxygen on platinum

Answer: B. Adsorption of nitrogen on charcoal
Physisorption occurs due to weak van der Waals forces, and gases like nitrogen are physically adsorbed on charcoal. Hydrogen on nickel and oxygen on platinum are examples of chemisorption.

The Freundlich adsorption isotherm is represented by which of the following equations?

A. x/m = kP
B. x/m = kP^(1/n) ✓
C. PV = nRT
D. K = [A][B]/[C][D]

Answer: B. x/m = kP^(1/n)
According to Freundlich adsorption isotherm, the amount adsorbed per unit mass of adsorbent is proportional to pressure raised to a power. The equation is x/m = kP^(1/n).

Adsorption generally decreases with increase in temperature because:

A. Adsorption is always endothermic
B. Adsorption is usually exothermic ✓
C. Higher temperature increases surface area
D. Adsorbate becomes heavier

Answer: B. Adsorption is usually exothermic
Adsorption usually releases heat, so it is an exothermic process. Increasing temperature shifts the equilibrium toward desorption, reducing adsorption.

The adsorption of a gas on a solid surface is found to increase sharply at low pressure and then gradually reach a maximum. This behavior is best described by:

A. Henry's law only
B. Freundlich adsorption isotherm ✓
C. Avogadro's law
D. Raoult's law

Answer: B. Freundlich adsorption isotherm
Freundlich adsorption isotherm explains the increase in adsorption with pressure and the tendency to approach saturation at higher pressure. It fits experimental adsorption data well over a limited range.

Which of the following statements is correct regarding emulsions?

A. In oil-in-water emulsion, water is the dispersed phase
B. In water-in-oil emulsion, oil is the dispersed phase
C. In oil-in-water emulsion, oil is the dispersed phase ✓
D. Both phases are always equally dispersed

Answer: C. In oil-in-water emulsion, oil is the dispersed phase
In an oil-in-water emulsion, oil is the dispersed phase and water is the dispersion medium. This distinction is commonly tested in board exams.

← Previous Chapter

Unit 3: Electro Chemistry and Chemical Kinetics

Next Chapter →

Unit 5: p-Block Elements