JEE Main problems

77 problems for JEE Main practice, in Physics, Chemistry and Mathematics, each with a worked solution. Try each one on paper first, then check your answer.

All SubjectsPhysicsChemistryMathematicsBiologyPython ProgrammingStatistics & Data Science

All LevelsHigh School (9–10)High School (11–12)General

All TopicsStates of MatterMixtures and SolutionsAtoms and MoleculesStructure of the AtomChemical ReactionsAcids, Bases and SaltsMetals and Non-metalsCarbon and Its CompoundsThe Periodic TableChemical BondingChemical Thermodynamics

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Type:AnyConceptualNumerical

1.

For N₂O₄(g) ⇌ 2NO₂(g), Δ H° = +57.2 kJ/mol and Δ S° = +175.8 J/(K mol). New

High School (11–12) · Entropy, Gibbs Energy and SpontaneityJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IBStemPy Lab

Hard

2.

Methane cannot be made cleanly from carbon and hydrogen, so its Δf H° is found with Hess's law. New

High School (11–12) · Enthalpy and Hess's LawJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IB, GaokaoStemPy Lab

Medium

3.

Breaking one mole of CH₄(g) into atoms takes 1665 kJ. New

High School (11–12) · Enthalpy and Hess's LawJEE Main, NEET, BITSAT, WBJEE, Board Exam, AP, A-Level, IB, GaokaoStemPy Lab

Hard

4.

The B₂ molecule has 10 electrons. Write its configuration, find its bond order, and find the number… New

High School (11–12) · Molecular Orbitals and Hydrogen BondsJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Medium

5.

Light of wavelength 250 nm and power 2.0 mW falls on potassium, with a work function of 2.30 eV.

High School (11–12) · Light, Atomic Spectra and the Bohr ModelJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Hard

6.

Singly charged ions of boron-10 and boron-11 are accelerated through the same voltage and enter the…

High School (11–12) · Isotopes and Isobars, Subatomic Particles and Atomic ModelsJEE Main, NEET, BITSAT, WBJEEStemPy Lab

Medium

7.

Alpha particles of 6.0 MeV are fired straight at a silver nucleus, with Z = 47 and A = 108.

High School (11–12) · Subatomic Particles and Atomic ModelsJEE Main, NEET, BITSAT, WBJEE, Board ExamStemPy Lab

Hard