JEE Main Equilibrium: Weightage, Key Concepts and Study Plan

Equilibrium is a dependable mid-weight chapter in JEE Main Chemistry, ranked #13 of 20 with 4.8% of recent questions. Here is what five years of JEE Main questions say about it, and how to prepare.

At a glance

• 126 questions across 2022–2026, all shifts
• 4.3% of Chemistry over five years and 4.8% in 2024–2026
• Rank #13 of 20 Chemistry chapters by recent weight
• Momentum: Stable
• Asked in 5 of 5 years; busiest year 2022 with 31 questions
• 26 questions in the 2026 papers

Year-wise questions

How Equilibrium compares inside Chemistry

Concepts that repeat

These specific ideas came back most often inside Equilibrium.

Start your practice with these. Each one has appeared in every one of the five years, so it is worth knowing the question styles.

What the syllabus covers

Dynamic equilibrium, Kp and Kc, Le Chatelier's principle, ionic equilibrium, acids and bases, pH, common ion effect, hydrolysis of salts, solubility product, buffer solutions, Henry's law.

A checklist to tick off:

• Dynamic equilibrium
• Kp and Kc
• Le Chatelier's principle
• Ionic equilibrium
• Acids and bases
• PH
• Common ion effect
• Hydrolysis of salts
• Solubility product
• Buffer solutions
• Henry's law

What to focus on

Kp and Kc relations, pH and buffer calculations, solubility product and the common-ion effect.

A study plan for this chapter

Treat it as a dependable source of marks and keep it in your regular revision cycle. If you divide your Chemistry time in proportion to recent weightage, this chapter earns about 5% of it.

1. Days 1–4: theory and solved examples.
2. Days 5–9: chapter-wise PYQs and error log.
3. Ongoing: a short revision every ten days.

Keep reading

• The full ranking: JEE Main Chemistry chapter-wise weightage
• Next chapter by weight: Chemical Kinetics
• A heavier neighbour: Chemical Thermodynamics

See Equilibrium on the weightage page →

Practise JEE PYQs →

Frequently Asked Questions