Atoms and Nuclei PYQs - Last 5 Years

MHT CET / Physics / Modern Physics / 125 recent questions

PhysicsModern Physics2022-2026

All Atoms and Nuclei PYQs Last 10 Years Create chapter test

Practice 125 MHT CET Physics questions from Atoms and Nuclei. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

125

PYQs on Page

Physics / Modern Physics

2022-2026

Year Range

Based on indexed question metadata

125

Last 5 Years

2022-2026

125

Last 10 Years

2017-2026

Recent Year Trend

2022

2023

2024

2025

2026

202238 max PYQs/year2026

Question Types

125PYQs

MCQ100%

Difficulty Mix

#1 Unknown125

125 in last 5 years125 in last 10 years

Last 5 Years Atoms and Nuclei Questions

Showing 25 of 125 filtered questions.

1Atoms And Nuclei

The wavelength of light for the least energetic photons emitted in the Lyman series of the hydrogen spectrum is nearly [Take \(\mathrm{hc}=1240 ~\mathrm{eV}\) - \(\mathrm{nm}\), change in energy of the levels \(=10.2 ~\mathrm{eV}\) ]

2Atoms And Nuclei

The force acting on the electron in hydrogen atom (Bohr' theory) is related to the principle quantum number '\(n\)' as

3Atoms And Nuclei

Magnetic field at the centre of the hydrogen atom due to motion of electron in \(\mathrm{n}^{\text {th }}\) orbit is proportional to

4Atoms And Nuclei

If the radius of the first Bohr orbit is '\(r\)' then the de-Broglie wavelength of the electron in the \(4^{\text {th }}\) orbit will be

5Atoms And Nuclei

Frequency of the series limit of Balmer series of hydrogen atom in terms of Rydberg's constant (R) and velocity of light (c) is

6Atoms And Nuclei

Half life of radio-active element is 1600 years. The fraction of sample remains undecayed after 6400 years will be

7Atoms And Nuclei

Ratio of longest wavelength corresponding to Lyman and Balmer series in hydrogen spectrum is

8Atoms And Nuclei

An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following particles.

9Atoms And Nuclei

A radioactive sample has half-life of 5 years. The percentage of fraction decayed in 10 years will be

10Atoms And Nuclei

When an electron is excited from its 4 th orbit to 5 th stationary orbit, the change in the angular momentum of electron is approximately.
(Planck's constant \(=h=6.63 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) )

11Atoms And Nuclei

An excited hydrogen atom emits a photon of wavelength \(\lambda\) in returning to ground state. The quantum number \(n\) of the excited state is (\(R=\) Rydberg's constant)

12Atoms And Nuclei

The wavelength of radiation emitted is '\(\lambda_0\)' when an electron jumps from the second excited state to the first excited state of hydrogen atom. If the electron jumps from the third excited state to the second orbit of the hydrogen ...

13Atoms And Nuclei

In Lyman series, series limit of wavelength is \(\lambda_1\). The wavelength of first line of Lyman series is \(\lambda_2\) and in Balmer series, the series limit of wavelength is \(\lambda_3\). Then the relation between \(\lambda_1\), $$\l...

14Atoms And Nuclei

In Balmer series, wavelength of the \(2^{\text {nd }}\) line is '\(\lambda_1\)' and for Paschen series, wavelength of the \(1^{\text {st }}\) line is '\(\lambda_2\)', then the ratio '\(\lambda_1\)' to '\(\lambda_2\)' is

15Atoms And Nuclei

Two different radioactive elements with half lives '\(\mathrm{T}_1\)' and '\(\mathrm{T}_2\)' have undecayed atoms '\(\mathrm{N}_1\)' and '\(\mathrm{N}_2\)' respectively present at a given instant. The ratio of their activities at that insta...

16Atoms And Nuclei

In a radioactive disintegration, the ratio of initial number of atoms to the number of atoms present at time \(t=\frac{1}{2 \lambda}\) is [\(\lambda=\) decay constant]

17Atoms And Nuclei

An electron in the hydrogen atom jumps from the first excited state to the ground state. What will be the percentage change in the speed of electron?

18Atoms And Nuclei

The orbital magnetic moment associated with orbiting electron of charge '\(e\)' is

19Atoms And Nuclei

Bohr model is applied to a particle of mass '\(\mathrm{m}\)' and charge '\(\mathrm{q}\)' moving in a plane under the influence of a transverse magnetic field '\(B\)'. The energy of the charged particle in the \(\mathrm{n}^{\text {th }}\) le...

20Atoms And Nuclei

According to Bohr's theory of hydrogen atom, the total energy of the electron in the \(\mathrm{n}^{\text {th }}\) stationary orbit is

21Atoms And Nuclei

The ratio of longest to shortest wavelength emitted in Paschen series of hydrogen atom is

22Atoms And Nuclei

The shortest wavelength in the Balmer series of hydrogen atom is equal to the shortest wavelength in the Brackett series of a hydrogen like atom of atomic number \(\mathrm{z}\). The value of \(\mathrm{z}\) is

23Atoms And Nuclei

The ratio of the velocity of the electron in the first Bohr orbit to that in the second Bohr orbit of hydrogen atom is

24Atoms And Nuclei

The wave number of the last line of the Balmer series in hydrogen spectrum will be
(Rydberg's constant \(=10^7 \mathrm{~m}^{-1}\) )

25Atoms And Nuclei

Using Bohr's model, the orbital period of electron in hydrogen atom in the \(\mathrm{n}^{\text {th }}\) orbit is \(\left(\varepsilon_0=\right.\) permittivity of vacuum, \(\mathrm{h}=\) Planck's constant, \(\mathrm{m}=\) mass of electron, $$...