Select Chapter Topics:
Q. No.If an alpha nucleus of energy \(\frac{1}{2}mv^2\) bombards a heavy nuclear target of charge \(Ze\), then the distance of closest approach for the alpha nucleus will be proportional to:
1.
\(\frac{1}{Ze} \)
2.
\(v^2 \)
3.
\(\frac{1}{m} \)
4.
\(\frac{1}{v^4}\)
Subtopic: Various Atomic Models |
83%
From NCERT
AIPMT - 2010
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The ratio of the longest wavelengths corresponding to the Lyman and Balmer series in the hydrogen spectrum is:
| 1. | \(\frac{3}{23}\) | 2. | \(\frac{7}{29}\) |
| 3. | \(\frac{9}{31}\) | 4. | \(\frac{5}{27}\) |
Subtopic: Spectral Series |
88%
From NCERT
AIPMT - 2013
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Given that the value of the Rydberg constant is \(10^{7}~\text{m}^{-1}\), what will be the wave number of the last line of the Balmer series in the hydrogen spectrum?
1. \(0.5 \times 10^{7}~\text{m}^{-1}\)
2. \(0.25 \times 10^{7} ~\text{m}^{-1}\)
3. \(2.5 \times 10^{7}~\text{m}^{-1}\)
4. \(0.025 \times 10^{4} ~\text{m}^{-1}\)
1. \(0.5 \times 10^{7}~\text{m}^{-1}\)
2. \(0.25 \times 10^{7} ~\text{m}^{-1}\)
3. \(2.5 \times 10^{7}~\text{m}^{-1}\)
4. \(0.025 \times 10^{4} ~\text{m}^{-1}\)
Subtopic: Spectral Series |
86%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The ratio of the total acceleration of the electron in a singly ionised helium atom and a hydrogen atom (both in the ground state) is:
1. \(1\)
2. \(8\)
3. \(4\)
4. \(16\)
1. \(1\)
2. \(8\)
3. \(4\)
4. \(16\)
Subtopic: Bohr's Model of Atom |
53%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
An electron revolves around a nucleus of charge \(Ze\). In order to excite the electron from the state \(n=3\) to \(n=4\), the energy required is \(66.0 ~\text{eV}\).
The value of \(Z\) will be:
1. \(25\)
2. \(10\)
3. \(4\)
4. \(5\)
Subtopic: Bohr's Model of Atom |
66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
How much is the total energy of an electron in the first orbit of a hydrogen atom equal to?
| 1. | total energy of electron in \(1\text{st}\) orbit of \(\mathrm{He}^{+}\) |
| 2. | total energy of electron in \(3\text{rd}\) orbit of \(\mathrm{He}^{+}\) |
| 3. | total energy of electron in \(2\text{nd}\) orbit of \(\mathrm{Li}^{++}\) |
| 4. | total energy of electron in \(3\text{rd}\) orbit of \(\mathrm{Li}^{++}\) |
Subtopic: Bohr's Model of Atom |
72%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The electric potential between a proton and an electron is given by \(V = V_0\mathrm{Ln}\left(\frac{r}{r_0}\right)\) where \(r_0\) is a constant. Assuming Bohr’s model to be applicable, the variation of \(r_n\) with \(n\), \(n\) being the principal quantum number, is:
1. \(r_n \propto n\)
2. \(r_n \propto\frac{1}{n}\)
3. \(r_n\propto n^2\)
4. \(r_n \propto\frac{1}{n^2}\)
1. \(r_n \propto n\)
2. \(r_n \propto\frac{1}{n}\)
3. \(r_n\propto n^2\)
4. \(r_n \propto\frac{1}{n^2}\)
Subtopic: Bohr's Model of Atom |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
In a hypothetical Bohr hydrogen, the mass of the electron is doubled.
What will be the energy \(E_0\) and the radius \(r_0\) of the first orbit?
\((a_0\)
\((a_0\)
| 1. | \(E_0=-27.2 ~\text{eV};~r_0={a}_0 / 2\) |
| 2. | \(E_0=-27.2 ~\text{eV}; ~r_0={a}_0\) |
| 3. | \(E_0=-13.6~\text{eV} ; ~r_0={a}_0 / 2\) |
| 4. | \(E_0=-13.6 ~\text{eV}; ~r_0={a}_0\) |
Subtopic: Bohr's Model of Atom |
54%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
What is the ratio of the longest to shortest wavelengths in Brackett series of hydrogen spectra?
| 1. | \(\dfrac{25}{9}\) | 2. | \(\dfrac{17}{6}\) |
| 3. | \(\dfrac{9}{5}\) | 4. | \(\dfrac{4}{3}\) |
Subtopic: Spectral Series |
79%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
What is the ratio of the largest to shortest wavelengths in the Lyman series of hydrogen spectra?
| 1. | \(\dfrac{25}{9}\) | 2. | \(\dfrac{17}{6}\) |
| 3. | \(\dfrac{9}{5}\) | 4. | \(\dfrac{4}{3}\) |
Subtopic: Spectral Series |
82%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Select Chapter Topics:
© 2024 GoodEd Technologies Pvt. Ltd.