JEE Main Chemistry Important Formulas 2026 - Download PDF

JEE Main Chemistry important formulas must be kept handy for ready reference for quick revision purposes. Keeping a formula book or a PDF saves a lot of time as it does not require referring to the textbook every time a formula is forgotten or needs to be referred to.

The most important topics in Chemistry for which the formulas must be remembered are Stoichiometry, Gaseous State, Chemical Equilibrium, and Ionic Equilibrium, among others.

JEE Main is an entrance examination that is conducted on an all-India basis to admit students to various engineering colleges where the JEE Main scores are accepted.

JEE Main Chemistry Important Formulas 2026- Download PDF

The students must keep a list of the important formulas in Chemistry handy. This will serve as a quick reference, omitting the need to refer to the textbook at all times. Referring to the book for formulas is time consuming.

Compiled below is a list of the important formulas for Chemistry for the JEE Main 2026 exam

Read More: JEE Main Preparation Tips

Top 15 JEE Main Chemistry Formulas

1. Atomic number = No. of protons in the nucleus = No. of electrons in the nucleus

2. Molality (m) = No. of Moles of Solutes/ Mass of solvent in kg

3. Mass number = No. of protons + No. of neutrons ; C= vλ

4. T(K)= T(0C) + 273.15

5. Molarity (M)= No. of Moles of Solutes/ Volume of Solution in Liters

6. Molecular Mass = 2 x vapor density

7. Charles’s Law: V1/ T1 = V2/ T2 (at constant P and n)

8. Boyle’s Law: P1V1 = P2V2 (at constant T and n)

9. Enthalpy: H = U + pV

10. Ohm’s Law: V = RI where, R = ρ ι/a

11. First Law of Thermodynamics: ΔU = q + W

12. Freundlich Adsorption Isotherm: [x/m]-Kp (1/n); n>=1

13. Faraday’s First Law of Electrolysis:
M = Zit
▪ M = mass of substance deposited
▪ Z = Electrochemical Equivalent
▪ I = current,
▪ T = time
▪ Z = Atomic Mass/ n x F

14. Faraday’s Second Law of Electrolysis: M1/ M2 = E1/E2 , where E = equivalent weight

15. General Electronic Configuration: ns1-2

Also Check: JEE Main Preparation Tips for Chemistry 2026

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