Class 11 Chemistry — Chapter 6: Equilibrium
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 11 Chemistry Chapter 6, "Equilibrium", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Equilibrium" is one of the chapters where reactions, named concepts, and balanced numerical work really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Equilibrium, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Chemistry mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Equilibrium (Class 11 Chemistry)
This chapter covers physical and chemical equilibrium, Le Chatelier's principle, ionic equilibrium, pH, buffers and solubility product.
- Dynamic equilibrium
- Forward and backward reactions occur at equal rates; concentrations stay constant though reactions continue.
- Equilibrium constant
- Kc (concentrations) and Kp (partial pressures) quantify the position of equilibrium; large K favours products.
- Le Chatelier's principle
- A system at equilibrium shifts to oppose a change in concentration, pressure or temperature.
- Acids, bases & pH
- Arrhenius, Bronsted–Lowry and Lewis concepts; pH = −log[H⁺], with pH + pOH = 14 at 25 °C.
- Buffers & solubility product
- Buffers resist pH change; Ksp governs precipitation and the common-ion effect.
Key formulas — Equilibrium
💡 Exam tips for Equilibrium
- Apply Le Chatelier's principle to predict the direction of shift when conditions change.
- Adding a common ion suppresses ionisation/solubility (common-ion effect).
Sample questions
Chemical equilibrium is:
Both reactions continue at equal rates.
Le Chatelier's principle states equilibrium shifts to:
System opposes the change.
For aA + bB ⇌ cC + dD, Kc =
Products / reactants raised to stoichiometric powers.
Equilibrium — FAQs
What are the key concepts in Class 11 Chemistry Equilibrium?+
This chapter covers physical and chemical equilibrium, Le Chatelier's principle, ionic equilibrium, pH, buffers and solubility product. Key ideas include Dynamic equilibrium, Equilibrium constant, Le Chatelier's principle, Acids, bases & pH, Buffers & solubility product.
What does Class 11 Chemistry Chapter 6 (Equilibrium) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Equilibrium" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Equilibrium" questions free to practise?+
Yes — sign in with Google to practise "Equilibrium" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Equilibrium" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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