Official sources only · nothing leaves this device

JEE Main + JEE Advanced — the official syllabus

Every unit and topic below is extracted from the exam bodies' own PDFs, which are stored alongside this page. No coaching-site material was used anywhere on this page, as a source or otherwise.

Scope: JEE Main Paper 1 (B.E./B.Tech.) — Mathematics, Physics, Chemistry — and the JEE Advanced syllabus. Paper 2A (B.Arch.), Paper 2B (B.Planning) and the Advanced Architecture Aptitude Test (AAT) are deliberately out of scope and are not reproduced here; Paper 2A/2B Mathematics is in any case identical to Paper 1's.

Main vs Advanced — the differences run both ways

A common assumption is that JEE Advanced simply contains everything in JEE Main and more. It does not. Each exam names topics the other leaves out, so a plan built on "Advanced covers Main anyway" has real holes in it. The rows below were disambiguated by hand against both PDFs rather than by raw string search, because a plain text match gives false negatives (for example Advanced writes "CFT" where Main writes "crystal field").

TopicSubjectMain AdvancedNote

What was removed, and when

The official 2026 PDF carries no changelog and no deletion notes at all. It was searched for delet, remov, reduc, rational, omitt and exclude; every hit was an ordinary word in an unrelated sentence. So a student working from an older book or an older question bank gets no warning from the official source itself that a topic has been dropped. That is what the list below is for.

A real reduction did happen between the 2021 and the 2025 official documents. Unit counts went from 16 / 21 / 28 (Maths / Physics / Chemistry) in 2021 to 14 / 20 / 20 in 2025 and 2026.

The exact year cannot be pinned down, and this page will not guess it. No primary document is reachable for 2022, 2023 or 2024 — NTA's live site keeps only 2025 and 2026, and the Internet Archive has no capture of this path for 2024. So every statement here is bracketed as "at some point between the 2021 and the 2025 official documents". Any source that names a specific year for the reduction is asserting more than the primary documents support.

Gone from Main between 2021 and 2025

Nine of those Chemistry topics are still examined — by JEE Advanced. States of Matter, Solid State, Surface Chemistry, Hydrogen, s-Block Elements, Isolation of Metals, Environmental Chemistry, Polymers and Chemistry in Everyday Life all remain live headings in the JEE Advanced 2026 syllabus. They left Main; they did not leave the exam system. Practice on them is not wasted work if Advanced is on the table.
JEE Advanced's own reduction history was not checked. Only the 2026 brochure was retrieved, so this page cannot say whether the Advanced syllabus has changed over the years. "Not checked" is the honest state — it is not the same as "unchanged", and it should not be read that way.

A note on the JEE Advanced source

JEE Advanced 2026 was organised by IIT Roorkee — taken from that year's official site's own masthead and footer, not inferred from a rotation pattern. The Advanced site is rebuilt from scratch each year by whichever IIT takes over, so the 2026 brochure URL is very likely to stop working once the 2027 site replaces it. That is why the PDF sits next to this page rather than being merely linked.

The organising institute for JEE Advanced 2027 has not been announced by the Joint Admission Board. Nothing on the official site names one. Coaching sites do name one, inferring it from the seven-IIT rotation, but that is an aggregator's guess and this page will not repeat it as fact. Treat the 2027 organiser as unknown until JAB says otherwise.

There is also no standalone JEE Advanced syllabus PDF. The syllabus exists only as Annexure-I inside the full information brochure, which is the document vendored here.

One gap worth knowing about

Main Physics Unit 20, Experimental Skills, has no matching chapter in the practice tool. It names 18 specific experiments — vernier calipers, screw gauge, metre bridge, half-deflection galvanometer, p-n junction and Zener characteristic curves, refractive index by travelling microscope, and others — and it is examined. Mathematics (14 of 14) and Chemistry (20 of 20) are fully covered by the existing chapter set; Physics is 19 of 20, and this is the missing one.

Sources

Those five documents, plus the Internet Archive for the 2021 one, are the whole source list. No coaching site, aggregator, or question-bank site was consulted for any statement on this page.