JEE Main chemistry, unit by unit.

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Question 1Section A: multiple choice

For A + B → products at a fixed temperature, three experiments give these initial rates. Experiment 1:

[\mathrm{A}]

= 0.10

[\mathrm{B}]

= 0.20

, rate

4.0 \times 10^{-4}

. Experiment 2:

[\mathrm{A}]

= 0.30

[\mathrm{B}]

= 0.20

, rate

1.2 \times 10^{-3}

. Experiment 3:

[\mathrm{A}]

= 0.20

[\mathrm{B}]

= 0.40

, rate

3.2 \times 10^{-3}

. (Concentrations in

\mathrm{mol\,L^{-1}}

, rates in

\mathrm{mol\,L^{-1}\,s^{-1}}

.) What are the rate law and the rate constant?

Ten sections, all 20 units

Built for the chemistry part of JEE (Main) Paper 1 (B.E./B.Tech.), on the 2027 syllabus: all 20 units of physical, inorganic and organic chemistry, including the practical chemistry unit, Section A multiple choice and Section B numerical-value questions. Chemistry only: no mathematics or physics, and not built for JEE Advanced or Paper 2.

Physical chemistry

1. Basic concepts and atomic structure · 2. Bonding and thermodynamics · 3. Solutions and equilibrium · 4. Redox, electrochemistry and kinetics

Inorganic chemistry

5. Periodicity and the p-block · 6. The d- and f-block and coordination compounds

Organic chemistry

7. Purification, analysis and basic organic principles · 8. Hydrocarbons and organic halogen compounds · 9. Organic compounds containing oxygen and nitrogen · 10. Biomolecules and practical chemistry

Chemistry in JEE (Main) Paper 1
Section A	Multiple-choice questions with four options and one correct answer.	20 questions
Section B	Questions whose answer is a numerical value, entered as an integer on an on-screen keypad.	5 questions
Marking	+4 for a right answer, -1 for a wrong one and 0 if unanswered, in both sections.	100 marks
Time	Paper 1 is 3 hours for mathematics, physics and chemistry together, computer-based.	3 hours

The 2027 sessions

Session 1	20, 21, 22, 23, 24 and 28 January 2027
Session 2	2, 3, 4, 5, 6 and 7 April 2027

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