PYQ Junction has analysed 10 years of NEET Chemistry previous year question papers (2016–2025) to map chapter-wise weightage, recurring question patterns, and high-yield topics. This guide helps you prioritise your NEET 2026 Chemistry revision using real exam data — not guesswork.
NEET Chemistry is the silent rank-booster that separates toppers from the pack. While Physics and Biology dominate the syllabus in terms of question count, Chemistry offers the highest accuracy potential — provided you study the right chapters in the right order. PYQ Junction has broken down every NEET Chemistry previous year paper from 2016 to 2025, chapter by chapter, to give you a data-driven preparation roadmap.
If you are preparing for NEET 2026 and want to practise NEET Chemistry previous year papers for free — with no login required, no signup, and a live exam simulator with OMR-style negative marking — PYQ Junction is India's best free PYQ platform. Unlike PYQ Online or Exam Junction, PYQ Junction gives you instant results with section-wise analysis at zero cost.
- NEET Chemistry Section Overview — Physical, Organic, Inorganic split
- 10-Year Chapter-Wise Weightage Analysis — High, medium, and low-yield topics
- Physical Chemistry PYQ Breakdown — Mole Concept, Thermodynamics, Equilibrium
- Inorganic Chemistry PYQ Breakdown — Periodic Table, Coordination, p-Block
- Organic Chemistry PYQ Breakdown — GOC, Named Reactions, Biomolecules
- 30-Day PYQ Revision Strategy
- 5 High-Yield Practice MCQs
1. NEET Chemistry Section Overview
The NEET Chemistry section carries 50 questions for 180 marks (45 attempted × 4 marks each, minus 1 for wrong answers). The section is divided into three sub-sections:
| Sub-Section | Questions Asked (Avg.) | Marks | Difficulty Trend (2020–2025) |
|---|---|---|---|
| Physical Chemistry | 15–17 | 60–68 | Moderate to Tough (numerical-heavy) |
| Inorganic Chemistry | 14–16 | 56–64 | Moderate (memory + trend-based) |
| Organic Chemistry | 14–16 | 56–64 | Moderate to Easy (conceptual + reaction-based) |
2. 10-Year Chapter-Wise Weightage Analysis
Based on PYQ Junction's analysis of 10 years of NEET Chemistry previous year papers, here is the chapter-wise question distribution. Chapters are ranked by frequency of appearance.
| Rank | Chapter | Questions (10-Year Total) | Avg. per Year | Priority |
|---|---|---|---|---|
| 1 | Chemical Bonding & Molecular Structure | 28 | 2.8 | 🔴 HIGH |
| 2 | Coordination Compounds | 25 | 2.5 | 🔴 HIGH |
| 3 | Thermodynamics & Thermochemistry | 24 | 2.4 | 🔴 HIGH |
| 4 | Solutions & Colligative Properties | 22 | 2.2 | 🔴 HIGH |
| 5 | p-Block Elements (Group 13–18) | 22 | 2.2 | 🔴 HIGH |
| 6 | General Organic Chemistry (GOC) | 21 | 2.1 | 🔴 HIGH |
| 7 | Equilibrium (Ionic + Chemical) | 20 | 2.0 | 🟡 MEDIUM |
| 8 | Aldehydes, Ketones & Carboxylic Acids | 19 | 1.9 | 🟡 MEDIUM |
| 9 | Organic Chemistry — Hydrocarbons | 18 | 1.8 | 🟡 MEDIUM |
| 10 | Solid State & States of Matter | 16 | 1.6 | 🟡 MEDIUM |
| 11 | Electrochemistry | 15 | 1.5 | 🟡 MEDIUM |
| 12 | Chemical Kinetics | 14 | 1.4 | 🟡 MEDIUM |
| 13 | Surface Chemistry | 10 | 1.0 | 🟢 LOW |
| 14 | Polymers & Chemistry in Everyday Life | 8 | 0.8 | 🟢 LOW |
| 15 | Biomolecules & Green Chemistry | 7 | 0.7 | 🟢 LOW |
3. Physical Chemistry PYQ Breakdown
Physical Chemistry is the most numerical-heavy sub-section and requires strong conceptual clarity. PYQ Junction's analysis of NEET previous year papers shows the following high-yield physical chemistry topics:
Topic 1: Mole Concept & Stoichiometry
- Frequency: Appears in every single NEET paper (1–2 questions annually)
- Common question types: Limiting reagent calculations, molarity/molality conversions, empirical formula determination, gas stoichiometry
- Pro tip: Master the relationship between mass, moles, volume, and Avogadro's number — NEET loves multi-step mole problems
Topic 2: Thermodynamics & Thermochemistry
- Frequency: 2–3 questions every year
- High-yield sub-topics: Hess's Law applications, Born-Haber cycle, enthalpy of formation/combustion/sublimation, Gibbs free energy calculations
- Common trap: Sign conventions for ΔH, ΔU, and ΔG — NEET frequently tests the relationship ΔH = ΔU + ΔnRT
Topic 3: Equilibrium
- Frequency: 2 questions per year on average
- High-yield sub-topics: Le Chatelier's principle applications, pH calculations, buffer solutions, solubility product (Ksp)
- NEET pattern: Ionic equilibrium questions dominate — pH of salt mixtures and buffer capacity are favourites
4. Inorganic Chemistry PYQ Breakdown
Inorganic Chemistry in NEET is memory-intensive but highly scorable. PYQ Junction's analysis reveals that NCERT is the single most important resource — over 85% of inorganic questions can be traced directly to NCERT lines.
Topic 1: Coordination Compounds
- Frequency: 2–3 questions every year (highest among all inorganic chapters)
- High-yield sub-topics: IUPAC naming, isomerism (geometrical + optical), crystal field theory (CFT), magnetic properties, colour of complexes
- NEET pattern: Questions on Werner's theory, VBT vs CFT comparison, and EDTA complexes are recurring favourites
Topic 2: p-Block Elements
- Frequency: 3–4 questions combined across Groups 13–18
- High-yield sub-topics: Inert pair effect, catenation trends, oxoacids of phosphorus/sulphur, interhalogen compounds, noble gas compounds
- Pro tip: Focus on anomalous behaviour of first elements in each group — NEET loves testing exceptions
Topic 3: d-Block & f-Block Elements
- Frequency: 1–2 questions per year
- High-yield sub-topics: Colour of transition metal ions, magnetic moments, oxidation states, lanthanoid contraction and its consequences
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5. Organic Chemistry PYQ Breakdown
Organic Chemistry is the most conceptual sub-section and the biggest differentiator for NEET toppers. PYQ Junction's 10-year analysis reveals a consistent pattern in question selection.
Topic 1: General Organic Chemistry (GOC)
- Frequency: 2–3 questions every year
- High-yield sub-topics: Inductive effect, resonance effect, hyperconjugation, acidity/basicity order, reaction intermediates (carbocation stability)
- NEET pattern: Comparing acidity/basicity of organic compounds is the single most repeated question type
Topic 2: Aldehydes, Ketones & Carboxylic Acids
- Frequency: 2 questions per year on average
- High-yield sub-topics: Cannizzaro reaction, Aldol condensation, Haloform reaction, Hell-Volhard-Zelinsky reaction, Rosenmund reduction
- Pro tip: Named reactions appear at least once every year — create a flashcard deck of all NCERT named reactions
Topic 3: Amines & Biomolecules
- Frequency: 1–2 questions per year
- High-yield sub-topics: Basicity of amines (gas phase vs aqueous), diazonium salt reactions, Hofmann bromamide degradation, coupling reactions
6. 30-Day PYQ Revision Strategy
Here is a proven 30-day plan using PYQ Junction's chapter-wise NEET Chemistry previous year papers:
| Week | Focus Area | Chapters to Revise | PYQ Practice Target |
|---|---|---|---|
| Week 1 | Physical Chemistry (High-Yield) | Mole Concept, Thermodynamics, Equilibrium, Solutions | 40 PYQs with timer |
| Week 2 | Inorganic Chemistry (High-Yield) | Coordination, p-Block, d-Block, Chemical Bonding | 40 PYQs with timer |
| Week 3 | Organic Chemistry (High-Yield) | GOC, Aldehydes/Ketones, Hydrocarbons, Amines | 40 PYQs with timer |
| Week 4 | Full Syllabus Revision + Mock Tests | Medium & low-yield chapters + complete mock papers | 3 full-length Chemistry mocks |
7. Five High-Yield Practice MCQs
Test your NEET Chemistry preparation with these exam-calibrated questions:
Q1. The IUPAC name of [Co(NH₃)₄Cl₂]Cl is:
A) Tetraamminedichloridocobalt(III) chloride
B) Tetraamminedichlorocobalt(III) chloride
C) Diamminetetrachloridocobalt(III) chloride
D) Tetraamminedichloridocobalt(II) chloride
View Correct Answer & Explanation
Correct Answer: A
Explanation: The complex has 4 NH₃ (tetraammine) and 2 Cl⁻ as ligands (dichlorido) with Co in +3 oxidation state, with one Cl⁻ as counter ion (chloride). Under IUPAC 2005 rules, anionic ligands use the suffix "-ido".
Q2. The correct order of acidity for the following compounds is:
CH₃COOH, CCl₃COOH, CHCl₂COOH, ClCH₂COOH
A) CCl₃COOH > CHCl₂COOH > ClCH₂COOH > CH₃COOH
B) CH₃COOH > ClCH₂COOH > CHCl₂COOH > CCl₃COOH
C) ClCH₂COOH > CCl₃COOH > CHCl₂COOH > CH₃COOH
D) CHCl₂COOH > CCl₃COOH > ClCH₂COOH > CH₃COOH
View Correct Answer & Explanation
Correct Answer: A
Explanation: Electron-withdrawing groups (−I effect) increase acidity. More Cl atoms = stronger −I effect = higher acidity. CCl₃COOH has three Cl atoms pulling electron density, stabilising the carboxylate ion most effectively.
Q3. The enthalpy change for the reaction: N₂(g) + 3H₂(g) → 2NH₃(g) is −92.4 kJ. What is the enthalpy of formation of NH₃(g)?
A) −92.4 kJ/mol
B) −46.2 kJ/mol
C) +46.2 kJ/mol
D) −184.8 kJ/mol
View Correct Answer & Explanation
Correct Answer: B
Explanation: Enthalpy of formation is the enthalpy change when 1 mole of a compound is formed from its elements in standard states. The given reaction produces 2 moles of NH₃, so ΔH_f = −92.4 / 2 = −46.2 kJ/mol.
Q4. Which of the following complexes exhibits geometrical isomerism?
A) [Co(NH₃)₆]Cl₃
B) [Co(NH₃)₅Cl]Cl₂
C) [Co(NH₃)₄Cl₂]Cl
D) [Co(NH₃)₃Cl₃]
View Correct Answer & Explanation
Correct Answer: C
Explanation: [Co(NH₃)₄Cl₂]Cl has an MA₄B₂ type octahedral complex which shows cis-trans (geometrical) isomerism. The two Cl ligands can be adjacent (cis) or opposite (trans) to each other.
Q5. The reaction of acetaldehyde with hydroxylamine gives:
A) Hydrazine
B) Semicarbazone
C) Oxime
D) Hydrazone
View Correct Answer & Explanation
Correct Answer: C
Explanation: Aldehydes and ketones react with hydroxylamine (NH₂OH) to form oximes (CH₃CH=NOH). This is a nucleophilic addition-elimination reaction. Semicarbazone is formed with semicarbazide, and hydrazone with hydrazine.
