Atoms and Nuclei PYQs - Last 5 Years
VITEEE / Physics / Modern Physics / 11 recent questions
PhysicsModern Physics2021-2025
Practice 11 VITEEE 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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Last 5 Years Atoms and Nuclei Questions
Showing 11 of 11 filtered questions.
1Atoms And Nuclei
The radius of the orbit of an electron in a Hydrogen-like atom is $45 a_0$, where $a_0$ is the Bohr radius. Its orbital angular momentum is $\frac{3 h}{2 \pi}$. It is given that $h$ is Planck constant and $R$ is Rydberg constant. The possib...
MCQ+4 / -12025
2Atoms And Nuclei
In the fusion reaction,
\({ }_1^2 \mathrm{H}+{ }_1^2 \mathrm{H} \longrightarrow{ }_2^3 \mathrm{He}+{ }_0^1 \mathrm{n}\)
the masses of deuteron, helium and neutron expressed in amu are 2.015, 3.017 and 1.009, respectively. If 1 kg of deute...
\({ }_1^2 \mathrm{H}+{ }_1^2 \mathrm{H} \longrightarrow{ }_2^3 \mathrm{He}+{ }_0^1 \mathrm{n}\)
the masses of deuteron, helium and neutron expressed in amu are 2.015, 3.017 and 1.009, respectively. If 1 kg of deute...
MCQ+4 / -12025
3Atoms And Nuclei
The ratio of minimum wavelengths of Balmer and Paschen series of hydrogen atom will be
MCQ+4 / -12024
4Atoms And Nuclei
A radioactive element \(X\) convents into another stable element \(Y\). Half-life of \(X\) is 2 hrs. Initially only \(X\) is present. After time \(t\), the ratio of atoms of \(X\) and \(Y\) is found to be \(1: 4\), then \(t\) in hours is
MCQ+4 / -12023
5Atoms And Nuclei
The wavelength of \(k_\alpha\)-line characteristic \(X\)-rays emitted by an element is \(0.32 \mathop A\limits^o\). The wavelength of the \(k_\beta\)-line emitted by the same element will be
MCQ+4 / -12023
6Atoms And Nuclei
The activity of a radioactive sample is measured as No counts per minute at \(t=0\) and \(\mathrm{N}_0 / \mathrm{e}\) counts per minute at \(t=6 \mathrm{~min}\). The time (in minutes) at which the activity reduces to half its value is.
MCQ+4 / -12023
7Atoms And Nuclei
The half-life period of a radioactive element \(x\) is same as the mean life time of another radioactive element \(y\). Initially, both of them have the same number of atoms. Then,
MCQ+4 / -12022
8Atoms And Nuclei
A nuclide at rest emits an $\alpha$-particle. In this process
MCQ+4 / -12022
9Atoms And Nuclei
According to Bohr model of hydrogen atom, only those orbits are permissible which satisfy the condition
MCQ+4 / -12021
10Atoms And Nuclei
Polonium has a half-life of 140 days. If we take \(20 \mathrm{~g}\) of polonium initially then the amount of it that remains after 280 days is
MCQ+4 / -12021
11Atoms And Nuclei
The Rutherford scattering experiment proves that an atom consists of
MCQ+4 / -12021