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Saturday, 31 October

JEE Main 2025 · PhysicsMultiple choiceOtherEasyApplication

JEE Main 2 April 2025, Shift 1, Physics Q43

Question 43 of 75 in this shift, Physics question 18 of 25, Section A.

Considering Bohr's atomic model for hydrogen atom : (A) the energy of H atom in ground state is same as energy of He+\mathrm{He^+} ion in its first excited state. (B) the energy of H atom in ground state is same as that for Li++\mathrm{Li^{++}} ion in its second excited state. (C) the energy of H atom in its ground state is same as that of He+\mathrm{He^+} ion for its ground state. (D) the energy of He+\mathrm{He^+} ion in its first excited state is same as that for Li++\mathrm{Li^{++}} ion in its ground state. Choose the correct answer from the options given below :
  1. (1)(A), (B) onlyOfficial answer
  2. (2)(A), (C) only
  3. (3)(B), (D) only
  4. (4)(A), (D) only

Official answer

Option 1

NTA final key.

Chapter
Atoms
Topic
Bohr's Atomic Model
Idea tested
Energy Level Calculations

Same idea in other shifts

Asked 12× in all
  1. 2 Apr 2026, Shift 1 · Q44Angular momentum of an electron in a hydrogen atom is 3hπ\frac{3h}{\pi}, then the energy of the electron is ______ eV.EasySingle correct
  2. 6 Apr 2024, Shift 1 · Q60Radius of a certain orbit of hydrogen atom is 8.48 Å. If energy of electron in this orbit is E/xE/x, then xx = __________. (Given aoa_o =…EasyNumerical value
  3. 6 Apr 2023, Shift 1 · Q34The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength isEasyDiagram basedHas a figure
  4. 11 Apr 2023, Shift 2 · Q44The energy of He+\mathrm{He^+} ion in its first excited state is, (The ground state energy for the Hydrogen atom is −13.6 eV-13.6\ \mathrm{eV}):EasySingle correct
  5. 29 Jul 2022, Shift 1 · Q47Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its (i) second permitted energy…EasySingle correct
  6. 27 Jun 2022, Shift 1 · Q54A beam of monochromatic light is used to excite the electron in Li++\mathrm{Li^{++}} from the first orbit to the third orbit. The wavelength…MediumNumerical value
  7. 27 Jun 2022, Shift 2 · Q48Given below are two statements: Statement I: In hydrogen atom, the frequency of radiation emitted when an electron jumps from lower energy…EasyTwo statements
  8. 30 Jun 2022, Shift 1 · Q59A hydrogen atom in its first excited state absorbs a photon of energy x×10−2x\times10^{-2} eV and excited to a higher energy state where the…MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.