Atoms and Nuclei PYQs - Last 5 Years

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Practice 22 KCET 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 22 of 22 filtered questions.

1Atoms And Nuclei

The radius of first orbit in hydrogen atom is $5.3 \times 10^{-11}$ m. The kinetic energy $E_K$, potential energy $E_P$ and total energy $E_T$ of electron in first orbit are

2Atoms And Nuclei

Bohr's second postulate implies quantisation of

3Atoms And Nuclei

An electron transition takes place from excited state to ground state in hydrogen atom, then

4Atoms And Nuclei

Which of the following statements is incorrect with reference of 'Nuclear force'?

5Atoms And Nuclei

\(\text { Match the following types of nuclei with examples shown }\)
$$ \begin{array}{|l|l|} \hline \text { Column-I } & \text { Column-II } \\ \hline \text { A. Isotopes } & \text { i. } \mathrm{Li}^7, \mathrm{Be}^7 \\ \hline \text { B....

6Atoms And Nuclei

If the radius of first Bohr orbit is $r$, then the radius of the second Bohr orbit will be

7Atoms And Nuclei

The natural logarithm of the activity $R$ of a radioactive sample varies with time $t$ as shown. At $t=0$, there are $N_0$ undecayed nuclei. Then, $N_0$ is equal to [Take $e^2=7.5$ ]

8Atoms And Nuclei

In alpha particle scattering experiment, if $v$ is the initial velocity of the particle, then the distance of closest approach is $d$. If the velocity is doubled, then the distance of closest approach becomes

9Atoms And Nuclei

The ratio of volume of $\mathrm{Al}^{27}$ nucleus to its surface area is (Given, $R_0=1.2 \times 10^{-15} \mathrm{~m}$)

10Atoms And Nuclei

The ratio of area of first excited state to ground state of orbit of hydrogen atom is

11Atoms And Nuclei

Consider the nuclear fission reaction ${ }_0^1 n+{ }_{92}^{235} \mathrm{U} \longrightarrow{ }_{56}^{144} \mathrm{Ba}+{ }_{36}^{89} \mathrm{Kr}+3{ }_0^1 n$. Assuming all the kinetic energy is carried away by the fast neutrons only and total ...

12Atoms And Nuclei

A nucleus with mass number 220 initially at rest emits an alpha particle. If the \(Q\) value of reaction is \(5.5 ~\mathrm{MeV}\). Calculate the value of kinetic energy of alpha particle

13Atoms And Nuclei

In the following equation representing \(\beta^{-}\) decay, the number of neutrons in the nucleus \(X\) is
\({ }_{83}^{210} \mathrm{Bi} \longrightarrow X+e^{-1}+\bar{v}\)

14Atoms And Nuclei

A radioactive sample has half-life of 3 years. The time required for the activity of the sample to reduce to \(\frac{1}{5}\)th of its initial value is about

15Atoms And Nuclei

Three energy levels of hydrogen atom and the corresponding wavelength of the emitted radiation due to different electron transition are as shown. Then,

16Atoms And Nuclei

In the Rutherford's alpha scattering experiment, as the impact parameter increases, the scattering angle of the alpha particle

17Atoms And Nuclei

A nuclear reactor delivers a power of \(10^9 \mathrm{~W}\), the amount of fuel consumed by the reactor in one hour is

18Atoms And Nuclei

Which of the following radiations is deflected by electric field?

19Atoms And Nuclei

Binding energy of a nitrogen nucleus \(\left[{ }_7^{14} \mathrm{~N}\right]\), given \(m\left[{ }_7^{14} \mathrm{~N}\right]=14.00307 \mathrm{u}\)

20Atoms And Nuclei

If an electron is revolving in its Bohr orbit having Bohr radius of 0.529\(\mathop A\limits^o\), then the radius of third orbit is

21Atoms And Nuclei

In accordance with the Bohr's model, the quantum number that characterises the Earth's revolution around the Sun in an orbit of radius \(1.5 \times 10^{11} \mathrm{~m}\) with orbital speed \(3 \times 10^4 \mathrm{~ms}^{-1}\) is
[given, mass...

22Atoms And Nuclei

The radius of hydrogen atom in the ground state is 0.53\(\mathop A\limits^o\). After collision with an electron, it is found to have a radius of 2.12\(\mathop A\limits^o\), the principal quantum number \(n\) of the final state of the atom...