(\(e\) = electronic charge)
| 1. | \(\dfrac{k e^{2}}{r^{2}}\) | 2. | \(\dfrac{k e^{2}}{2 r}\) |
| 3. | \(\dfrac{k e^{2}}{r}\) | 4. | \(\dfrac{k e^{2}}{2 r^{2}}\) |
The ionisation potential of hydrogen atom is
1. 13.60 volt
2. 8.24 volt
3. 10.36 volt
4. 14.24 bolt
Orbital acceleration of electrons is:
1. \(\frac{n^2h^2}{4\pi^2m^2r^3}\)
2. \(\frac{n^2h^2}{4n^2r^3}\)
3. \(\frac{4n^2h^2}{\pi^2m^2r^3}\)
4. \(\frac{4n^2h^2}{4\pi^2m^2r^3}\)
Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model:
1. 13.6 eV
2. 0.65 eV
3. 1.9 eV
4. 11.1 eV
(\(h = 6.626\times 10^{-34}\) J-s)
1. \(1.11\times 10^{34}~\text{J-s}\)
2. \(1.51\times 10^{-31}~\text{J-s}\)
3. \(2.11\times 10^{-34}~\text{J-s}\)
4. \(3.72\times 10^{-34}~\text{J-s}\)
As per the Bohr model, the minimum energy (in eV) required to remove the electron from the ground state of a double ionised lithium ion (\(Z=3\)) is:
1. \(1.51\)
2. \(13.6\)
3. \(40.8\)
4. \(122.4\)
According to Bohr's theory, the moment of momentum of an electron revolving in second orbit of hydrogen atom will be:
1. \(2\pi h\)
2. \(\pi h\)
3. \(\frac{h}{\pi}\)
4. \(\frac{2h}{\pi}\)
1. \(3.40~\text{eV}\)
2. \(1.51~\text{eV}\)
3. \(0.85~\text{eV}\)
4. \(0.66~\text{eV}\)
The ratio of the energies of the hydrogen atom in its first to second excited states is
1.
2.
3.
4. 4
1. \(38.2\)
2. \(49.2\)
3. \(51.8\)
4. \(79.0\)
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