Go Wide Before You Go Deep: How to Split Your JEE Main Preparation

The short answer: if you have limited time before JEE Main, don't finish one subject and then start the next. Learn the most important topics in Physics, Chemistry and Maths first, then go deeper in all three together. With the same amount of study, this simple switch prepares you for up to nearly twice as many questions in the early months.

That's not an opinion. We went through every JEE Main paper from 2024, 2025 and 2026 — more than 55 shifts per subject — and counted where the questions actually came from. Here is what we found, and you can try it yourself below.

Try it: how many questions are you ready for?

Move the slider to the number of topics ("concepts") you think you can master before the exam. Watch the two numbers.

At 150 concepts, a student who spreads them across all three subjects is ready for about 42 of the 75 questions in a paper. A student who puts the same effort into finishing one subject first is ready for about 24. Same hours, very different result.

Why does spreading out win?

Because every subject has a few topics that come up again and again, and a long tail of topics that come up rarely.

• The first 40 or so topics in a subject cover about 10 of its 25 questions.
• The last 100 or so topics together cover only 2 or 3.

So once you've done the big topics in Physics, the next Physics topic is worth much less than the first big topic in Chemistry you haven't touched yet. Drag the marker in the chart below and see how the value of your "next 20 topics" changes from subject to subject.

The rule of thumb: always spend your next hour where the next topic is worth the most. In practice that means keeping all three subjects moving together, and switching when one starts giving you very little.

A real example

Say you've already done the top 88 topics in Physics. Learning 50 more Physics topics would prepare you for only about 3.6 more questions per paper. If you spent those same 50 topics on Maths (after its top 37), you'd be ready for about 6.7 more. In Chemistry (after its top 60), about 5.3 more.

So how should you split your time?

Roughly equally — and that's the good news, because it's easy to follow. The best possible split leans a little towards Physics and Maths at the start (their top topics carry more marks), and a little towards Chemistry later (Chemistry's marks are spread over many smaller topics).

Which chapters to revise first?

If you're revising, start with the chapters that bring the most questions per paper. Switch between subjects below.

The leaders: Modern Physics, Heat & Thermodynamics and Current Electricity in Physics; Coordination Compounds, Electrochemistry and General Organic Chemistry in Chemistry; 3D Geometry, Sequences & Series and Sets, Relations & Functions in Maths.

Three tiers to aim for

We turned this into a ranked list of topics in three tiers for each subject:

• Tier 1 — Must do. In every JEE Main paper from 2024 to 2026, these alone covered at least 8 of the 25 questions in each subject (about 14 in a typical paper). Physics 39 topics, Chemistry 60, Maths 37.
• Tier 2 — Should do. Together with Tier 1, at least 15 of 25 in every paper.
• Tier 3 — Good to do. All three tiers together, at least 20 of 25.

Compass Learning students get the full ranked list as a PDF. If you'd like a copy, call or WhatsApp us on +91 88828 02121.

Compass students can also practise every topic on this list, concept by concept, with the real JEE Main questions — and see how many they have finished:

A few honest limits

• Past papers aren't a promise. They show where the marks have been. The pattern has been steady for years, but the exam can always surprise.
• Topics aren't all the same size. One "topic" in Chemistry can be quicker to learn than one in Maths. Use this as a direction, not an exact timetable.
• Finish the syllabus eventually. Going wide first is about order. Over a full year, you should still cover everything.

The bottom line

1. Learn the most important topics of all three subjects before going deep into any one.
2. Keep the three subjects moving together, roughly equally.
3. When a subject starts giving you very little for your time, switch.

How we did this: we took every JEE Main question from the 2024, 2025 and 2026 papers in the Compass question bank, sorted each into its chapter and topic, and counted how often each topic appeared per paper. Chapters removed from the syllabus in 2024 are left out.