CN  ChemNexa

Surface Chemistry WBCHSE Class 12 MCQ & Practice Questions

Practice Surface Chemistry MCQs for WBCHSE Class 12 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

Register Free for Full Chemistry Practice

Surface Chemistry Revision Guide for WBCHSE Class 12 Chemistry

Surface Chemistry is part of WBCHSE Class 12 Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Surface Chemistry, then test recall with mixed MCQs.

What to practise in Surface Chemistry

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Surface Chemistry before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBCHSE Class 12 Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Surface Chemistry MCQs with Answers

These public questions are selected from the exact Surface Chemistry chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

1. Adsorption is primarily a:

  • A. Nuclear phenomenon
  • B. Phase transition only
  • C. Surface phenomenon
  • D. Bulk phenomenon
Answer: C
Explanation: Adsorption involves accumulation at a surface.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

2. Absorption differs from adsorption because absorption occurs:

  • A. Only in solids
  • B. Throughout the bulk
  • C. Only at the surface
  • D. Only in gases
Answer: B
Explanation: Absorption distributes a substance throughout the bulk phase.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

3. In physisorption, adsorbate is held mainly by:

  • A. van der Waals forces
  • B. Strong covalent bonds only
  • C. Ionic bonds only
  • D. Metallic bonds
Answer: A
Explanation: Physical adsorption arises mainly from weak intermolecular forces.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

4. Chemisorption generally involves:

  • A. Only weak dispersion forces
  • B. No specificity
  • C. Zero activation energy always
  • D. Chemical bond formation
Answer: D
Explanation: Chemical adsorption forms stronger, often specific surface bonds.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

5. Physisorption is generally:

  • A. Highly specific
  • B. Restricted to monolayers only
  • C. Reversible
  • D. Always irreversible
Answer: C
Explanation: Weak forces make physical adsorption comparatively reversible.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

6. Chemisorption is generally:

  • A. Independent of surface chemistry
  • B. Specific in nature
  • C. Completely nonspecific
  • D. Always multilayer
Answer: B
Explanation: Chemical bonding depends on adsorbent-adsorbate identity.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

7. Adsorption of a gas on a solid usually increases when pressure:

  • A. Increases
  • B. Decreases
  • C. Becomes zero
  • D. Has no effect
Answer: A
Explanation: Higher gas pressure raises collision frequency and surface coverage.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

8. Physical adsorption generally decreases when temperature:

  • A. Decreases
  • B. Remains constant
  • C. Approaches 0 K
  • D. Increases
Answer: D
Explanation: Physisorption is exothermic, so heating favours desorption.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

9. Freundlich adsorption isotherm is commonly written as:

  • A. x/m=P/k
  • B. x/m=kP^n with n always >1
  • C. x/m=kP^(1/n)
  • D. x/m=k/P
Answer: C
Explanation: The empirical Freundlich relation connects adsorption per mass to pressure.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

10. In logarithmic form, Freundlich isotherm gives a plot of log(x/m) versus log P with slope:

  • A. 1/k
  • B. 1/n
  • C. n
  • D. k
Answer: B
Explanation: log(x/m)=log k+(1/n)logP.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

11. At very high pressure, Freundlich isotherm is limited because adsorption tends toward:

  • A. Saturation
  • B. Zero
  • C. Infinite linear increase
  • D. Negative values
Answer: A
Explanation: A finite surface has a maximum adsorption capacity.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

12. A catalyst changes reaction rate by:

  • A. Changing ΔG° permanently
  • B. Changing equilibrium constant
  • C. Increasing product enthalpy
  • D. Providing an alternative lower-Ea pathway
Answer: D
Explanation: Catalysts lower activation barriers without changing reaction thermodynamics.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

13. A catalyst does not change the:

  • A. Reaction pathway
  • B. Activation energy
  • C. Equilibrium constant
  • D. Rate of attainment of equilibrium
Answer: C
Explanation: Equilibrium constant depends on thermodynamics at a given temperature.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

14. Homogeneous catalysis occurs when catalyst and reactants are:

  • A. All gases only
  • B. In the same phase
  • C. Always in different phases
  • D. All solids
Answer: B
Explanation: Homogeneous catalysts share a phase with reactants.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

15. Heterogeneous catalysis occurs when catalyst and reactants are:

  • A. In different phases
  • B. In the same phase only
  • C. Always aqueous
  • D. Always gaseous
Answer: A
Explanation: Heterogeneous catalysis occurs at an interface between phases.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

16. In heterogeneous catalysis, reaction commonly begins with:

  • A. Destruction of catalyst
  • B. Precipitation of solvent
  • C. Nuclear activation
  • D. Adsorption of reactants on catalyst surface
Answer: D
Explanation: Surface adsorption brings reactants into activated configurations.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

17. A promoter is a substance that:

  • A. Always acts as reactant
  • B. Stops adsorption
  • C. Enhances catalyst activity
  • D. Poisons catalyst
Answer: C
Explanation: Promoters improve catalytic performance.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

18. A catalytic poison:

  • A. Is a colloid stabiliser only
  • B. Reduces catalyst activity
  • C. Always increases activity
  • D. Changes catalyst into product
Answer: B
Explanation: Poisons block or deactivate active catalytic sites.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

19. Enzymes are:

  • A. Biological catalysts
  • B. Inorganic precipitates only
  • C. Always colloidal metals
  • D. Surfactants only
Answer: A
Explanation: Enzymes accelerate biochemical reactions selectively.

WBCHSE Class 12 Chemistry · Surface Chemistry · Very Hard

20. Enzyme catalysis is generally highly:

  • A. Nonspecific
  • B. Independent of temperature
  • C. Independent of pH
  • D. Specific
Answer: D
Explanation: Enzymes often recognise particular substrates.

Login to Start Full Test

Surface Chemistry Practice Tests

Surface Chemistry Frequently Asked Questions

How should I prepare Surface Chemistry for WBCHSE Class 12 Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Surface Chemistry practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

Continue WBCHSE Class 12 Chemistry

View all WBCHSE Class 12 chapters and testsBrowse all Chemistry PracticeCreate a free account