JEE Chemistry

Quantum Numbers: JEE Questions & Solutions

10 previous-year JEE Chemistry questions on Quantum Numbers, each with a worked step-by-step solution.

Intermediate

Previous-year questions

  1. 01Given, (A) n=5, m_l = -1; (B) n=3, l=2, m_l = -1, m_s = +1/2. The maximum number of electron(s) in an atom that can have the quantum…MCQEasyJEE 2026
  2. 02Given below are two statements: Statement (I): For a given shell, the total number of allowed orbitals is given by n². Statement (II): For…MCQEasyJEE 2025
  3. 03In a multielectron atom, which of the following orbitals described by three quantum numbers will have the same energy in absence of…MCQEasyJEE 2025
  4. 04Which of the following is/are not correct with respect to the energy of atomic orbitals of a hydrogen atom? (A) 1s < 2p < 3d < 4s (B) 1s <…MCQMediumJEE 2025
  5. 05For electron in '2s' and '2p' orbitals, the orbital angular momentum values, respectively are:MCQEasyJEE 2025
  6. 06Consider the ground state of an atom (Z = 24). How many electrons are arranged with Azimuthal quantum number l = 1 and l = 2 respectively?MCQEasyJEE 2025
  7. 07The number of electrons present in all the completely filled subshells having n = 4 and s = ± 1/2 is:NVAMediumJEE 2024
  8. 08Maximum number of electrons that can be accommodated in shell with n = 4 are:MCQEasyJEE 2023
  9. 09Arrange the following orbitals in decreasing order of energy? (A) n = 3, l = 0, m = 0 (B) n = 4, l = 0, m = 0 (C) n = 3, l = 1, m = 0 (D) n…MCQEasyJEE 2023
  10. 10The orbital angular momentum of an electron in a 3s orbital is (x h)/2π. The value of x is (nearest integer).NVAEasyJEE 2023

Frequently asked questions

Our bank has 10 previous-year JEE Chemistry questions tagged to Quantum Numbers, drawn from JEE papers between 2023 and 2026, including 1 from 2026 alone. Each comes with a full step-by-step solution.

Quantum Numbers is rated Intermediate overall for JEE Chemistry. The PYQs on this page break down as 8 easy, 2 medium.

Of the 10 previous-year questions on Quantum Numbers, 8 are multiple-choice (MCQ) and 2 are numerical-value (NVA) questions.

Based on recent paper analysis, Quantum Numbers is worth about 1 mark in JEE Main. It sits in Atomic Structure, a Class 11 Chemistry chapter.

More Atomic Structure topics

Bohr Model & Hydrogen Spectrum25Electronic Configuration12Electromagnetic Radiation & Photoelectric Effect9Orbitals & Shapes6Dual Nature of Matter & de Broglie Relation4Heisenberg Uncertainty Principle2

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