Select Chapter Topics:
Q. No.Match the following:
Choose the correct answer from the options given below :
1. A-II, B-III, C-IV, D-I
2. A-I, B-II, C-III, D-IV
3. A-IV, B-II, C-III, D-I
4. A-II, B-III, C-I, D-IV
| List-I (Quantum Numbers) |
List-II (Orbital) |
|||
| 'n' | 'l' | |||
| A. | 2 | 1 | I. | 3d |
| B. | 4 | 0 | II. | 2p |
| C. | 5 | 3 | III. | 4s |
| D. | 3 | 2 | IV. | 5f |
Choose the correct answer from the options given below :
1. A-II, B-III, C-IV, D-I
2. A-I, B-II, C-III, D-IV
3. A-IV, B-II, C-III, D-I
4. A-II, B-III, C-I, D-IV
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
79%
Level 2: 60%+
NEET - 2026
Please attempt this question first.
Hints
Please attempt this question first.
A bulb is rated at 150 watt, converting 8% energy into light. If energy of one photon is \(4.42 \times 10^{-19} \mathrm{~J}\), how many photons are emitted by the bulb per second?
1. \(1.35 \times 10^{19}\)
2. \(4.06 \times 10^{19}\)
3. \(2.71 \times 10^{19}\)
4. \(27.2 \times 10^{19}\)
1. \(1.35 \times 10^{19}\)
2. \(4.06 \times 10^{19}\)
3. \(2.71 \times 10^{19}\)
4. \(27.2 \times 10^{19}\)
Subtopic: Photo Electric Effect |
64%
Level 2: 60%+
NEET - 2026
Please attempt this question first.
Hints
Please attempt this question first.
The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes \(n=2 \rightarrow n=3\) and \(n=4 \rightarrow n=6\) transitions, respectively, is
| 1. | \(\dfrac{1}{9}\) | 2. | \(\dfrac{1}{4}\) |
| 3. | \(\dfrac{1}{36}\) | 4. | \(\dfrac{1}{16}\) |
Subtopic: Hydrogen Spectra |
67%
Level 2: 60%+
NEET - 2025
Please attempt this question first.
Hints
Please attempt this question first.
Energy and radius of the first Bohr orbit of He+ and Li2+ are: [Given \(\left.\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}, \mathrm{a}_0=52.9 \mathrm{pm}\right]\)
| 1. | \(\begin{aligned} & \mathrm{E}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=-19.62 \times 10^{-16} \mathrm{~J} ; \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=17.6\mathrm{pm} \\ & \mathrm{E}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=8.72 \times 10^{-16} \mathrm{~J} ; \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=26.4 \mathrm{pm} \end{aligned}\) |
| 2. | \(\begin{aligned} & \mathrm{E}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=-8.72 \times 10^{-16} \mathrm{~J} ; \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=17.6 \mathrm{pm} \\ & \mathrm{E}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=-19.62 \times 10^{-16} \mathrm{~J} ; \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=17.6 \mathrm{pm} \end{aligned}\) |
| 3. | \(\begin{aligned} & \mathrm{E}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=- 19.62 \times 10^{-18} \mathrm{~J} \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=17.6 \mathrm{pm} \\ & \mathrm{E}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=-8.72 \times 10^{-18} \mathrm{~J} \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=26.4 \mathrm{pm} \end{aligned}\) |
| 4. | \(\begin{aligned} & \mathrm{E}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=-8.72 \times 10^{-18} \mathrm{~J} \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{Li}^{2+}\right)=26.4 \mathrm{pm} \\ & \mathrm{E}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=-19.62 \times 10^{-18} \mathrm{~J} ; \\ & \mathrm{r}_{\mathrm{n}}\left(\mathrm{He}^{+}\right)=17.6 \mathrm{pm} \end{aligned} \) |
Subtopic: Bohr's Theory |
59%
Level 3: 35%-60%
NEET - 2025
Please attempt this question first.
Hints
Please attempt this question first.
The energy of electron in the ground state \((\text{n}=1)\) for \(\text{He}^+\) ion is \(\text{-x}J,\) then that for an electron in \(\text{n}=2\) state for \(\text{Be}^{3+}\) ion in \(\text{J}\) is :
| 1. | \(-\dfrac x9\) | 2. | \(-4x\) |
| 3. | \(-\dfrac 49x\) | 4. | \(-x\) |
Subtopic: Bohr's Theory |
64%
Level 2: 60%+
NEET - 2024
Hints
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I Quantum Number |
List-II Information provided |
||
| A. | ml | I. | Shape of the orbital |
| B. | ms | II. | Size of the orbital |
| C. | l | III. | Orientation of the orbital |
| D. | n | IV. | Orientation of spin of the electron |
| 1. | A-III, B-IV, C-I, D-II | 2. | A-III, B-IV, C-II, D-I |
| 3. | A-II, B-I, C-IV, D-III | 4. | A-I, B-III, C-II, D-IV |
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
73%
Level 2: 60%+
NEET - 2024
Hints
Isotope of an element contains \(19.23 \%\) more neutrons as compared to protons. The correct element along with its mass number is: (Given Atomic number \(\mathrm{Fe: 26, Co: 27}\) )
| 1. | \(\mathrm {^{56}Fe }\) | 2. | \({ }^{57} \mathrm{Fe}\) |
| 3. | \({ }^{57} \mathrm{Co}\) | 4. | \({ }^{60} \mathrm{Co}\) |
Subtopic: Number of Electron, Proton & Neutron |
56%
Level 3: 35%-60%
NEET - 2024
Hints
Given below are two statements:
| Statement I: | The energy of the \(\mathrm{He}^{+}\) ion in \(n=2\) state is same as the energy of H atom in \(n=1\) state. |
| Statement II: | It is possible to determine simultaneously the exact position and exact momentum of an electron in \(\mathrm{H}\) atom. |
| 1. | Both Statement I and Statement II are true |
| 2. | Both Statement I and Statement II are false |
| 3. | Statement I is true and Statement II is false |
| 4. | Statement I is false, and Statement II is true |
Subtopic: Bohr's Theory | Heisenberg Uncertainty Principle |
66%
Level 2: 60%+
NEET - 2024
Hints
The quantum numbers of four electrons are given below:
A. \(n\)=3; \(l\)=2; \(m_l\)=1; and s=+\(\frac1{2}\)
B. \(n\)=4; \(l\)=1; \(m_l\)=0; and s=+\(\frac1{2}\)
C. \(n\)=4; \(l\)=2; \(m_l\)=-2; and s=-\(\frac1{2}\)
D. \(n\)=3; \(l\)=1; \(m_l\)=-1; and s=+\(\frac1{2}\)
The correct decreasing order of energy of these electrons is:
1. C>A>B>D
2. C>B>A>D
3. C>D>A>B
4. A>C>D>B
A. \(n\)=3; \(l\)=2; \(m_l\)=1; and s=+\(\frac1{2}\)
B. \(n\)=4; \(l\)=1; \(m_l\)=0; and s=+\(\frac1{2}\)
C. \(n\)=4; \(l\)=2; \(m_l\)=-2; and s=-\(\frac1{2}\)
D. \(n\)=3; \(l\)=1; \(m_l\)=-1; and s=+\(\frac1{2}\)
The correct decreasing order of energy of these electrons is:
1. C>A>B>D
2. C>B>A>D
3. C>D>A>B
4. A>C>D>B
Subtopic: Pauli's Exclusion Principle & Hund's Rule | AUFBAU Principle |
78%
Level 2: 60%+
NEET - 2024
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
| Statement I: | The Balmer spectral line for H atom with lowest energy appears at \(\dfrac 5{36}\mathrm{ R_H~ cm^{-1}}\) (\(\mathrm{R_H}\) = Rydberg constant) |
| Statement II: | When the temperature of a black body increases, the maxima of the curve (intensity versus wavelength) shifts towards shorter wavelength. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Bohr's Theory | Planck's Theory |
67%
Level 2: 60%+
NEET - 2024
Hints
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.