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Bohr Model of the Hydrogen Atom for GUJCET: 25 solved questions

Real GUJCET paper questions on bohr model of the hydrogen atom, part of atoms. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2026. No sign-in needed to read them.

What this topic asks

• Postulates, radius, speed and angular momentum — 12 questions
• Energy levels and ionisation — 10 questions
• Bohr's rules in other systems — 2 questions
• Units and dimensions — 1 question

All 25 questions with solutions

• The potential energy of the orbital electron in the ground state of hydrogen atom is -E. What is its kinetic… GUJCET 2007
• What will be the angular momentum in the fourth orbit, if L is the angular momentum of the electron in the se… GUJCET 2008
• The ratio of kinetic energy and the total energy of the electron in the nth quantum state of Bohr's atomic mo… GUJCET 2009
• The ratio of the areas of the electron orbits for the first excited state and the ground state of the hydroge… GUJCET 2009
• What is the difference of angular momenta of an electron between two consecutive orbits in hydrogen atom? GUJCET 2009
• A charge q₂ of mass m revolves around a stationary charge q₁ in a circular orbit of radius r. The orbital per… GUJCET 2011
• The total energy of electron in the second excited state is -2E. What is its potential energy in the same sta… GUJCET 2011
• According to Bohr's atomic model, the relation between the principal quantum number (n) and the radius of the… GUJCET 2011
• The total energy of an electron in the first excited state of H-atom is -3.4 eV, then its potential energy in… GUJCET 2017
• The ionization potential of hydrogenic ions P and Q are V_P and V_Q respectively. If V_Q<V_P then radii GUJCET 2017
• If the kinetic energy of the electron in the hydrogen atom is (e²)/(8πε₀r), then its potential energy is . GUJCET 2019
• The ground state energy of hydrogen atom is -13.6 eV. What is the kinetic energy of electron in this state? GUJCET 2020; GUJCET 2021
• The radius of the innermost electron orbit of a hydrogen atom is 5.3×10⁻¹¹ m. What is the radius of the n=4 o… GUJCET 2021
• The radius of the innermost electron orbit of a hydrogen atom is 5.3×10⁻¹¹ m. What is the radius of the n=3 o… GUJCET 2022
• In accordance with Bohr's model, find the quantum number that characterises the earth's revolution around the… GUJCET 2022
• In hydrogen atom an electron makes a transition from 5th orbit to 3rd orbit. The change in the angular moment… GUJCET 2023
• The ratio of radius for second and third orbit of hydrogen atom is . GUJCET 2024
• The ground state energy of hydrogen atom is -13.6 eV, then the potential energy of the electron in this state… GUJCET 2024
• According to Bohr's model, the orbital angular momentum of electrons in third excited state is [h = 6.63 × 10… GUJCET 2025
• 13.6 eV energy is required to separate a hydrogen atom into proton and an electron. If the orbital radius of… GUJCET 2025
• The ground state energy of hydrogen atom is -13.6 eV. The potential and kinetic energies of the electron in t… GUJCET 2025
• The ground state energy of hydrogen atom is -13.6 eV. What is the ratio of kinetic energy and potential energ… GUJCET 2026
• The radius of the innermost electron orbit of a hydrogen atom is 5.3 × 10⁻¹¹ m. What is the radius of the n =… GUJCET 2026
• In which of the following system will the radius of the second orbit be minimum? RS Academy GUJCET booklet
• Js is the unit of physical quantity. GUJCET 2024