NEET · Subject-wise preparation

NEET Chemistry preparation: one subject, three ways to study

By the PrepMatic team · Updated 8 Oct 2026 · 7 min read

NEET Chemistry is 45 questions for 180 marks, drawn from 20 NMC units. The trick to preparing for it is to stop treating it as one subject. Physical chemistry is formula-and-numerical work that you practise like Physics. Inorganic chemistry is NCERT facts that you memorise from tables, like Biology. Organic chemistry is a system of reactions and mechanisms that you build step by step, and it has its own page: organic chemistry for NEET.

The 20 units in three buckets

The NMC syllabus lists units by subject, not by class. The three-way grouping below is the usual way students split them, and each bucket needs a different method.

How the questions split between the three buckets varies from paper to paper, so do not plan around one fixed ratio. For tiers by unit, see NEET high weightage chapters.

Physical chemistry: formulas and numericals

Physical chemistry rewards a short formula sheet that you actually use. Learn each relation together with its condition.

A sign trap: Chemistry NCERT writes the first law as ΔU = q + w, where w is work done on the system. Physics writes it as Q = ΔU + W, where W is work done by the gas. Both conventions appear in NEET, so read the question's wording and decide which sign convention it uses before substituting.

Worked example: thermodynamics and units

For a reaction, ΔH = +40 kJ/mol and ΔS = +100 J/(K mol). Above what temperature is it spontaneous?

Spontaneous means ΔG = ΔH − TΔS < 0, so T > ΔH/ΔS. Convert ΔH to joules first: 40 kJ = 40,000 J. Then T > 40,000 / 100 = 400 K. A student who divides 40 by 100 gets 0.4 K and picks a wrong option. Mixing kJ and J is one of the most common numerical slips in this unit.

Worked example: Nernst equation

A cell has Zn²⁺ at 0.01 M and Cu²⁺ at 1 M, with E°cell = 1.10 V and n = 2, at 298 K.

Q = [Zn²⁺]/[Cu²⁺] = 0.01. E = 1.10 − (0.059/2) × log 0.01 = 1.10 − 0.0295 × (−2) = 1.10 + 0.059 = 1.159 V, about 1.16 V. Diluting the product side makes the cell more favourable, which is a quick sanity check on the sign.

Inorganic chemistry: this is an NCERT subject

Inorganic questions are mostly direct from NCERT text, tables and diagrams, so the method is to read every line and rebuild it as a table. Make one table per group in the p-block and one for the d-block, with columns for oxidation states, important compounds, preparation, properties and uses. Then revise the tables, not the chapters.

These are the traps that cost marks repeatedly. Learn them as exceptions.

Coordination compounds reward a worked routine. Take [Fe(CN)₆]³⁻: Fe³⁺ is d⁵, and CN⁻ is a strong-field ligand, so the electrons pair up in the t₂g orbitals, leaving one unpaired electron. The complex is low spin and inner-orbital (d²sp³). The spin-only magnetic moment is √[n(n + 2)] = √3 ≈ 1.73 BM. Repeat the same steps for a weak-field case such as [CoF₆]³⁻ (high spin, four unpaired electrons) and you have the pattern for most coordination questions.

Organic chemistry: build the system early

Eight of the 20 units sit in the organic bucket, so organic chemistry deserves steady time even though inorganic feels easier to finish. Start with Some Basic Principles of Organic Chemistry, because inductive effect, resonance, hyperconjugation and carbocation stability explain nearly every later reaction. Then work through hydrocarbons, halogen compounds, oxygen compounds and nitrogen compounds in that order. The organic chemistry guide covers the mechanisms, named reactions and conversion practice in depth.

A weekly rhythm for Chemistry

• Two sessions of physical numericals. At least ten problems each, with units written out.
• Two sessions of inorganic revision. Table-based, with a short written recall test at the start.
• Two sessions of organic. One for new reactions, one for conversions and mixed practice.
• Ten minutes daily of reaction and exception recall, from a card deck or a single sheet.

Chemistry has a high rate of forgetting, so it is the subject where the cycles in the NEET revision strategy pay off most. Read NCERT for NEET for how to extract tables and exceptions from the textbook, and use mock tests to see which bucket costs you the most marks.

Using PrepMatic for Chemistry

PrepMatic's free assessment is about 15 untimed multiple-choice questions. Its result shows whether Chemistry is among your weakest subjects, but at subject level, so it will not tell you whether physical, inorganic or organic is the problem. Your error log will. The study plan builds a Today view and Roadmap from your exam date, daily hours and study days, and topic tests let you check what you have just finished. You can also upload your own condensed notes, for example an exceptions sheet, and generate a mock from them.

Frequently asked questions

Which is the easiest part of NEET Chemistry?

For most students it is inorganic chemistry, because the questions are largely direct from NCERT. It is easy only if you have read every line and revised it several times. Left unrevised, inorganic is also the part that fades fastest.

Is NCERT enough for NEET Chemistry?

For inorganic and the theory of organic and physical, NCERT is the core. Physical chemistry numericals need extra practice beyond NCERT's exercises, and organic conversions need practice from a chapter-wise book or past papers.

How many units are in NEET Chemistry?

The NMC syllabus lists 20 Chemistry units: eight physical, four inorganic and eight organic when grouped the usual way. The NMC lists units only; the grouping is ours.

Should I learn the topics removed from the old syllabus?

The current NMC unit list does not name topics such as Solid State, Polymers or s-Block Elements. Check the NMC PDF to be sure before skipping a topic, and do not spend long on it if it is absent.

Which book is best for NEET Chemistry?

NCERT Class 11 and 12 for every unit. Add one practice source per bucket if you need it, for example a numerical-heavy book for physical chemistry. Avoid reading several books on the same unit.

Official sources

• National Medical Commission (NMC): the NEET-UG syllabus notified on 22 December 2025.
• NEET-UG official website (NTA): information bulletin, notices and answer keys.
• NCERT: free Class 11 and Class 12 Chemistry textbooks.

Confirm the syllabus and pattern in the latest NMC notification and NTA bulletin.

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