Atoms and Nuclei PYQs - Last 5 Years
JEE Main / Physics / Modern Physics / 165 recent questions
PhysicsModern Physics2022-2026
Practice 165 JEE Main 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.
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2022-2026
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165PYQs
MCQ69.7%
INTEGER30.3%
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#1 Easy102
#2 Medium61
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165 in last 5 years165 in last 10 years
Last 5 Years Atoms and Nuclei Questions
Showing 15 of 165 filtered questions.
1Atoms And Nuclei
In the hydrogen spectrum, \(\lambda\) be the wavelength of first transition line of Lyman series. The wavelength difference will be "a\(\lambda\)'' between the wavelength of \(3^{\text {rd }}\) transition line of Paschen series and that of ...
INTEGER+4 / -12022
2Atoms And Nuclei
The disintegration rate of a certain radioactive sample at any instant is 4250 disintegrations per minute. 10 minutes later, the rate becomes 2250 disintegrations per minute. The approximate decay constant is :
\(\left(\right.\)Take $$\left...
\(\left(\right.\)Take $$\left...
MCQ+4 / -12022
3Atoms And Nuclei
Two lighter nuclei combine to form a comparatively heavier nucleus by the relation given below :
\({ }_{1}^{2} X+{ }_{1}^{2} X={ }_{2}^{4} Y\)
The binding energies per nucleon for \(\frac{2}{1} X\) and \({ }_{2}^{4} Y\) are $$1.1 \,\mathrm{...
\({ }_{1}^{2} X+{ }_{1}^{2} X={ }_{2}^{4} Y\)
The binding energies per nucleon for \(\frac{2}{1} X\) and \({ }_{2}^{4} Y\) are $$1.1 \,\mathrm{...
INTEGER+4 / -12022
4Atoms And Nuclei
Mass numbers of two nuclei are in the ratio of \(4: 3\). Their nuclear densities will be in the ratio of
MCQ+4 / -12022
5Atoms And Nuclei
A nucleus of mass \(M\) at rest splits into two parts having masses \(\frac{M^{\prime}}{3}\) and \({{2M'} \over 3}(M' < M)\). The ratio of de Broglie wavelength of two parts will be :
MCQ+4 / -12022
6Atoms And Nuclei
The ratio for the speed of the electron in the 3rd orbit of He+ to the speed of the electron in the 3rd orbit of hydrogen atom will be :
MCQ+4 / -12022
7Atoms And Nuclei
Which of the following figure represents the variation of \({l_n}\left( {{R \over {{R_0}}}} \right)\) with \({l_n}A\) (if R = radius of a nucleus and A = its mass number)
MCQ+4 / -12022
8Atoms And Nuclei
The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by :
MCQ+4 / -12022
9Atoms And Nuclei
The momentum of an electron revolving in \(\mathrm{n}^{\text {th }}\) orbit is given by :
(Symbols have their usual meanings)
(Symbols have their usual meanings)
MCQ+4 / -12022
10Atoms And Nuclei
\({x \over {x + 4}}\) is the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its
(i) third permitted energy level to the second level and
(ii) the highest permitted energy level to the second per...
(i) third permitted energy level to the second level and
(ii) the highest permitted energy level to the second per...
INTEGER+4 / -12022
11Atoms And Nuclei
Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength \(\lambda\). The value of principal quantum number '\(n\)' of the excited state will be : (\(\mathrm{R}:\) Rydberg constant)
MCQ+4 / -12022
12Atoms And Nuclei
Nucleus A is having mass number 220 and its binding energy per nucleon is 5.6 MeV. It splits in two fragments 'B' and 'C' of mass numbers 105 and 115. The binding energy of nucleons in 'B' and 'C' is 6.4 MeV per nucleon. The energy Q releas...
MCQ+4 / -12022
13Atoms And Nuclei
Choose the correct option from the following options given below :
MCQ+4 / -12022
14Atoms And Nuclei
A sample contains 10\(-\)2 kg each of two substances A and B with half lives 4 s and 8 s respectively. The ratio of their atomic weights is 1 : 2. The ratio of the amounts of A and B after 16 s is \({x \over {100}}\). The value of x is ____...
INTEGER+4 / -12022
15Atoms And Nuclei
In Bohr's atomic model of hydrogen, let K, P and E are the kinetic energy, potential energy and total energy of the electron respectively. Choose the correct option when the electron undergoes transitions to a higher level :
MCQ+4 / -12022