12 JEE Main 2025 Atomic Physics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2025 previous-year questions from the Atomic Physics chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Atomic Physics chapter hub.
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A…
An electron in the hydrogen atom initially in the fourth excited state makes a transition to nth energy state by emitti…
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A: The…
In a hydrogen like ion, the energy difference between the 2ⁿd excitation energy state and ground is 108.8 eV. The atomi…
Assuming the validity of Bohr's atomic model for hydrogen like ions the radius of Li⁺⁺ion in its ground state is given…
The number of spectral lines emitted by atomic hydrogen that is in the 4th energy level, is
The frequency of revolution of the electron in Bohr's orbit varies with n, the principal quantum number as
Considering Bohr's atomic model for hydrogen atom : (A) the energy of H atom in ground state is same as energy of He⁺io…
Arrange the following in the ascending order of wavelength (λ) : (A) Microwaves (λ₁ ) (B) Ultraviolet rays (λ₂ ) (C) In…
Considering the Bohr model of hydrogen like atoms, the ratio of the ratio of the radius 5th orbit of the electron in Li…
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