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Chemical Equilibrium NEET MCQ & Practice Questions

Practice Chemical Equilibrium MCQs for NEET Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Chemical Equilibrium Revision Guide for NEET Chemistry

Chemical Equilibrium is part of NEET 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 Chemical Equilibrium, then test recall with mixed MCQs.

What to practise in Chemical Equilibrium

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Chemical Equilibrium before attempting MCQs.

Exam-style MCQs

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

Performance Practice

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

Top 20 Chemical Equilibrium MCQs with Answers

These public questions are selected from the exact Chemical Equilibrium 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.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

1. Which principle is essential when solving a quantitative problem in Chemical Equilibrium?

  • A. Ignoring limiting conditions
  • B. Conservation of mass and charge where applicable
  • C. Ignoring units
  • D. Assuming all coefficients are unity
Answer: B
Explanation: Mass and charge conservation are fundamental.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

2. At equilibrium in a reversible system related to Chemical Equilibrium, which statement is correct?

  • A. Forward and reverse rates are equal
  • B. All molecular motion stops
  • C. Reactant and product concentrations must be equal
  • D. The catalyst is consumed
Answer: A
Explanation: Dynamic equilibrium has equal forward and reverse rates.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

3. For a spontaneous process at constant T and P in a Chemical Equilibrium context, ΔG is

  • A. Positive
  • B. Always zero
  • C. Always equal to ΔH
  • D. Negative
Answer: D
Explanation: Spontaneity at constant T,P requires ΔG<0.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

4. Which statement about a catalyst in Chemical Equilibrium is correct?

  • A. It changes reaction enthalpy
  • B. It is always consumed
  • C. It lowers the activation barrier without changing K at fixed T
  • D. It changes ΔG°
Answer: C
Explanation: Catalysts affect kinetics, not equilibrium thermodynamics.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

5. Oxidation in a redox step relevant to Chemical Equilibrium means

  • A. Only gain of hydrogen
  • B. Loss of electrons
  • C. Gain of electrons
  • D. No oxidation-number change
Answer: B
Explanation: Oxidation is electron loss.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

6. Reduction in a redox step relevant to Chemical Equilibrium means

  • A. Gain of electrons
  • B. Loss of electrons
  • C. Increase in oxidation number
  • D. Only loss of hydrogen
Answer: A
Explanation: Reduction is electron gain.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

7. A Lewis acid encountered in Chemical Equilibrium is an

  • A. Electron-pair donor
  • B. Proton acceptor only
  • C. Anion only
  • D. Electron-pair acceptor
Answer: D
Explanation: Lewis acids accept electron pairs.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

8. A Lewis base encountered in Chemical Equilibrium is an

  • A. Cation only
  • B. Oxidising agent only
  • C. Electron-pair donor
  • D. Electron-pair acceptor
Answer: C
Explanation: Lewis bases donate electron pairs.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

9. Which is a state function useful in Chemical Equilibrium?

  • A. Path length
  • B. Enthalpy
  • C. Heat
  • D. Work
Answer: B
Explanation: Enthalpy is path independent.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

10. The relation between standard Gibbs energy and equilibrium constant is

  • A. ΔG°=-RT lnK
  • B. ΔG°=RT lnK
  • C. ΔG°=-KRT
  • D. ΔG°=RT/K
Answer: A
Explanation: The standard thermodynamic relation is ΔG°=-RT lnK.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

11. For a first-order kinetic process in Chemical Equilibrium, half-life equals

  • A. k/0.693
  • B. 1/(k[A]0)
  • C. [A]0/(2k)
  • D. 0.693/k
Answer: D
Explanation: First-order t1/2=0.693/k.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

12. The Arrhenius equation is

  • A. k=EaRT
  • B. k=A/RT
  • C. k=Ae^(-Ea/RT)
  • D. k=Ae^(Ea/RT)
Answer: C
Explanation: Arrhenius equation relates k to activation energy and temperature.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

13. For an ideal dilute solution relevant to Chemical Equilibrium, molarity is

  • A. Moles solvent per litre
  • B. Moles solute per litre solution
  • C. Moles solute per kg solvent
  • D. Grams solute per mole solvent
Answer: B
Explanation: M=n/V(L).

NEET Chemistry · Chemical Equilibrium · Very Very Hard

14. For a weak acid, a larger Ka generally indicates

  • A. A stronger acid
  • B. A weaker acid
  • C. No ionisation
  • D. A stronger conjugate acid
Answer: A
Explanation: Larger Ka means greater ionisation.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

15. At 25°C, pH+pOH for aqueous solution is

  • A. 7
  • B. 1
  • C. 0
  • D. 14
Answer: D
Explanation: pH+pOH=pKw=14 at 25°C.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

16. For an electrochemical cell, oxidation occurs at

  • A. Salt bridge
  • B. Electrolyte only
  • C. Anode
  • D. Cathode
Answer: C
Explanation: Oxidation occurs at the anode.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

17. For an electrochemical cell, reduction occurs at

  • A. Wire
  • B. Cathode
  • C. Anode
  • D. Salt bridge
Answer: B
Explanation: Reduction occurs at the cathode.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

18. A positive E°cell implies

  • A. ΔG°<0
  • B. ΔG°>0
  • C. K<1 necessarily
  • D. No spontaneous reaction
Answer: A
Explanation: ΔG°=-nFE°.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

19. Higher bond order generally corresponds to

  • A. Longer weaker bond
  • B. Longer stronger bond
  • C. No bond-length effect
  • D. Shorter stronger bond
Answer: D
Explanation: Higher bond order strengthens and shortens bonds.

NEET Chemistry · Chemical Equilibrium · Very Very Hard

20. A nucleophile in an organic reaction related to Chemical Equilibrium is

  • A. Always positively charged
  • B. Always a radical
  • C. Electron-pair donor
  • D. Electron-pair acceptor
Answer: C
Explanation: Nucleophiles donate electron pairs.

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Chemical Equilibrium Practice Tests

Chemical Equilibrium Frequently Asked Questions

How should I prepare Chemical Equilibrium for NEET 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 Chemical Equilibrium 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.

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