Chapter 12 of 16
Revision Notes
Chemical Equilibrium — Revision Notes
Maharashtra Board · Class 11 · Chemistry
Chemical Equilibrium revision notes for Maharashtra Board Class 11 Chemistry: 4 topics in quick points. Includes Types of Chemical Reactions, Equilibrium.
45 questions25 flashcards7 formulas & key relations5 concepts
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Key Topics to Revise
1
Types of Chemical Reactions and Reversible Reactions
- Irreversible reactions proceed in one direction until reactants are exhausted (C + O₂ → CO₂)
- Reversible reactions occur in both forward and backward directions simultaneously (H₂ + I₂ ⇌ 2HI)
- Double arrow (⇌) indicates reversibility, single arrow (→) indicates irreversibility
2
Equilibrium in Physical Processes
- Liquid-vapour equilibrium: H₂O(l) ⇌ H₂O(g) in closed container
- Evaporation rate = condensation rate at equilibrium
- Solid-liquid equilibrium: ice and water at 273K in insulated system
3
Chemical Equilibrium and Law of Mass Action
- Chemical equilibrium occurs when rate of forward reaction = rate of reverse reaction
- Concentrations of all species remain constant at equilibrium
- Law of Mass Action: rate ∝ product of concentration terms raised to their stoichiometric coefficients
4
Homogeneous and Heterogeneous Equilibria
- Homogeneous equilibrium: all species in same phase (2HI(g) ⇌ H₂(g) + I₂(g))
- Heterogeneous equilibrium: species in different phases (CaCO₃(s) ⇌ CaO(s) + CO₂(g))
- For heterogeneous equilibria, concentrations of pure solids and liquids are constant
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Full NotesKey Concepts
Irreversible reactions proceed in one directionAt equilibriumFor reaction aA + bB ⇌Homogeneous equilibrium involves all speciesReaction quotient Q has same form
Frequently Asked Questions
What are the important topics in Chemical Equilibrium for Maharashtra Board Class 11 Chemistry?
Key topics in Chemical Equilibrium include Types of Chemical Reactions and Reversible Reactions, Equilibrium in Physical Processes, Chemical Equilibrium and Law of Mass Action, Homogeneous and Heterogeneous Equilibria. Study these first, then practise questions on each for Class 11 exams.
How should I revise Chemical Equilibrium for Class 11 exams?
Learn the core ideas first, then work through the 45 practice questions on Chemical Equilibrium. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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