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JEE Mains Physics. Try each one first, then open its answer.

Top 10 JEE Mains PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 7 times: 2021 Paper 25, 25 Jan 2023, 8 Apr 2023, 31 Jan 2024, 6 Apr 2024, 7 Apr 2025, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 7 of this type

    19
    The ratio of momentum of the photons of the 1st 1^{\text{st~}} and 2nd 2^{\text{nd~}} line of Balmer series of Hydrogen atoms is α/β\alpha/\beta. The possible values of α\alpha and β\beta are :-

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  2. Question 2

    This type asked 6 times: 27 Jun 2022, 1 Feb 2023, 10 Apr 2023, 4 Apr 2024, 21 Jan 2026 S2, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 6 of this type

    19
    Angular momentum of an electron in a hydrogen atom is 3 hπ\frac{3\text{ }h}{\pi}, then the energy of the electron is ____\_\_\_\_ eV .

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  3. Question 3

    This type asked 6 times: 2021 Paper 7, 31 Jan 2023, 1 Feb 2023, 11 Apr 2023, 2 Apr 2025, 7 Apr 2025. This one: 7 Apr 2025 See all 6 of this type

    15
    In a hydrogen like ion, the energy difference between the 2nd 2^{\text{nd~}} excitation energy state and ground is 108.8 eV . The atomic number of the ion is

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  4. Question 4

    This type asked 6 times: 31 Jan 2023, 6 Apr 2023, 13 Apr 2023, 27 Jan 2024, 2 Apr 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 6 of this type

    20
    Considering the Bohr model of hydrogen like atoms, the ratio of the radius of the 5th 5^{\text{th~}} orbit of the electron in Li2+Li^{2 +} to that in He+He^{+} is

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  5. Question 5

    This type asked 6 times: 2021 Paper 21, 11 Apr 2023, 12 Apr 2023, 30 Jan 2024, 9 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 6 of this type

    95
    The number of spectral lines emitted by atomic hydrogen that is in the 4th 4^{\text{th~}} energy level, is

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  6. Question 6

    This type asked 5 times: 2021 Paper 4, 27 Jun 2022, 24 Jan 2023, 6 Apr 2024, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 5 of this type

    11
    In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a lower orbit (f). The ratio of the radius of the orbits is given by ri:rf=16:4r_{i}:r_{f}= 16:4. The wavelength of photon emitted due to this transition is ____\_\_\_\_ nm. (Given Rydberg constant =1.0973×107/m= 1.0973 \times10^{7}/m )

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  7. Question 7

    This type asked 4 times: 2021 Paper 7, 30 Jan 2024, 5 Apr 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 4 of this type

    82
    The frequency of revolution of the electron in Bohr's orbit varies with n , the principal quantum number as

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  8. Question 8

    This type asked 3 times: 10 Apr 2023, 5 Apr 2024, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 3 of this type

    7
    The smallest wavelength of Lyman series is 91 nm. The difference between the largest wavelengths of Paschen and Balmer series is nearly ____\_\_\_\_ nm.

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  9. Question 9

    This type asked 3 times: 8 Apr 2024, 21 Jan 2026 S1, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 3 of this type

    2
    7.9MeVα7.9MeV\alpha-particle scatters from a target material of atomic number 79. From the given data the estimated diameter of nuclei of the target material is (approximately) ____\_\_\_\_ m. [14πϵo=9×109Nm2/C2\left\lbrack \frac{1}{4\pi\epsilon_{o}}= 9 \times10^{9}Nm^{2}/C^{2} \right. and electron charge  =1.6×10−19C]\left. \ = 1.6 \times10^{- 19}C \right\rbrack

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  10. Question 10

    This type asked 3 times: 14 Jun 2022, 30 Jan 2024, 5 Apr 2024. This one: 5 Apr 2024 See all 3 of this type

    9
    An electron rotates in a circle around a nucleus having positive charge Ze. Correct relation between total energy (E) of electron to its potential energy (U) is:

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