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⚖️ Master Equilibrium
NCERT Class 11 · Chapter 7

Real PYQs from top competitive exams — filter by exam, attempt each question, track your progress and submit to see your full score report.

Attempt PYQs Study Strategy
Kc & KpLe ChatelierBufferpHSolubility
Reactants Products ⇌ Keq
50
Real PYQs
5
Exam Bodies
15+
Years Covered
~11%
Exam Weightage
PYQs Overview
⚖️
Kc & Kp Expressions
Write Kc/Kp; Kp=Kc(RT)^Δn; numericals on K calculation.
★★★★★
92% Frequency
🔄
Le Chatelier's Principle
Effect of T, P, concentration on equilibrium position.
★★★★★
89% Frequency
💧
Ionic Equilibrium & pH
pH=-log[H⁺], Ka, Kb, pKa, pKb, Henderson-Hasselbalch.
★★★★★
85% Frequency
🧪
Buffer Solutions
Henderson equation, buffer capacity, buffer preparation.
★★★★☆
78% Frequency
🔬
Solubility Product Ksp
Ksp expression, common ion effect, precipitation condition.
★★★★☆
70% Frequency
📊
Degree of Dissociation
α from Kc or Kp; weak acid/base dissociation calculations.
★★★☆☆
62% Frequency
Topic Frequency
Kc/Kp Expressions 92%
Le Chatelier's Principle 89%
pH Calculations 85%
Buffer Solutions 78%
Ksp & Common Ion 70%
Degree of Dissociation 62%
Kp=Kc(RT)^Δn 55%
💡 Did You Know?
  • Kc/Kp numerical in every JEE since 2002
  • Le Chatelier — every NEET paper since 2005
  • pH buffer — 12× in AIIMS since 2008
  • Ksp — zero skips in 13 yrs (NEET)
  • Chapter 7 = bridge to Physical Chemistry
Key Takeaways
🔑
Kp=Kc×(RT)^Δn
Δn = gaseous products − gaseous reactants. Kp=Kc when Δn=0.
⚡
Le Chatelier: system opposes imposed stress
Add reactant → shift right. Increase P → shift to fewer moles of gas.
📐
pH=pKa+log([A⁻]/[HA])
Henderson-Hasselbalch: maximum buffer capacity at pH=pKa.
🌊
Precipitation when Q > Ksp
Ionic product exceeds solubility product → precipitate forms.
🧮
[H⁺]=√(Ka×C) for weak acid
Valid when α<<1. pH=½(pKa−log C).
🎯
Only temperature changes K
Concentration and pressure shift position but NOT K.
Study Strategy
1
Equilibrium BasicsDay 1–2
Law of mass action, Kc/Kp expressions, Q vs K interpretation.
2
Le Chatelier & KDay 3
Effect of T on K (exo vs endo). All stress scenarios.
3
Ionic EquilibriumDay 4–5
pH, pOH, Ka, Kb, buffers, Ksp, common ion — 30+ numericals.
4
Attempt All PYQsDay 6–7
Kc/Kp and pH-buffer questions appear yearly — do every one.
5
Mock & RevisionDay 8
30-Q timed; target Kp=Kc(RT)^Δn and Le Chatelier combos.
🗓️ 8-Day Chapter Plan
Day 1–2 Equilibrium Basics
Day 3 Le Chatelier & K
Day 4–5 Ionic Equilibrium
Day 6–7 Attempt All PYQs
Day 8 Mock & Revision
🧠 Pro Tip: Only temperature changes K. Concentration, pressure, catalysts shift the position but NOT the constant.
🚀

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Equilibrium question?

Real PYQs, topic-wise overview, key takeaways and an 8-day strategy — all in one place.

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📝 PYQ Question Bank
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Real questions from IIT-JEE, NEET, AIIMS, BITSAT & KVPY — filter by exam, select your answer, submit to see your full score report.

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50 Redox Reactions PYQs | JEE, NEET & IIT-JEE MCQs
50 Redox Reactions PYQs | JEE, NEET & IIT-JEE MCQs — Complete Notes & Solutions · academia-aeternum.com
Preparing for competitive examinations requires more than just understanding the concepts—it demands exposure to the types of questions that repeatedly appear in exams. This collection of **50 Previous Year Questions (PYQs) and exam-pattern MCQs** from **NCERT Class 11 Chemistry Chapter 8 – Redox Reactions** has been carefully compiled to help students strengthen their conceptual foundation while improving their problem-solving speed and accuracy. The questions are inspired by reputed…
🎓 Class 11 📐 Chemistry 📖 NCERT ✅ Free Access 🏆 CBSE · JEE
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