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Q. No.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 |
66%
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 |
75%
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 |
58%
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 relation between \(n_m \) (\(n_m \) = number of permissible values of magnetic quantum number (ml) for a given value of azimuthal quantum number (l) is:
1. \(n_m = l+2\)
2. \(l = {\dfrac{n_m -1} 2}\)
3. \(l= 2n_m +1\)
4. \(n_m = 2l^2 + 1 \)
1. \(n_m = l+2\)
2. \(l = {\dfrac{n_m -1} 2}\)
3. \(l= 2n_m +1\)
4. \(n_m = 2l^2 + 1 \)
Subtopic: Shell & Subshell |
70%
Level 2: 60%+
NEET - 2023
Hints
Incorrect set of quantum numbers from the following is:
1. n=4,l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=-1/2
2. n=5, l=2, m1 =-2, -1, +1, +2, ms=+1/2
3. n=4, l=2, m1 = -2, -1, 0, +1, +2, ms=-1/2
4. n=5,l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=+1/2
1. n=4,l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=-1/2
2. n=5, l=2, m1 =-2, -1, +1, +2, ms=+1/2
3. n=4, l=2, m1 = -2, -1, 0, +1, +2, ms=-1/2
4. n=5,l=3, m1 =-3, -2, -1, 0, +1, +2, +3, ms=+1/2
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
83%
Level 1: 80%+
NEET - 2023
Hints
Given below are two statements:
In light of the above statements, choose the correct answer from the options given below:
| Statement I: | The value of wave function, \(\Psi\) depends upon the coordinates of the electron in the atom. |
| Statement II: | The probability of finding an electron at a point within an atom is proportional to the orbital wave function. |
| 1. | Statement I is True but Statement II is False. |
| 2. | Statement I is False but Statement II is True. |
| 3. | Both Statement I and Statement II are True. |
| 4. | Both Statement I and Statement II are False. |
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
Level 3: 35%-60%
NEET - 2023
Hints
Identify the incorrect statement from the following:
| 1. | The shapes of dxy, dyz, and dzx orbitals are similar to each other; and dx2 -y2 and dz2 are similar to each other. |
| 2. | All the five 5d orbitals are different in size when compared to the respective 4d orbitals. |
| 3. | All the five 4d orbitals have shapes similar to the respective 3d orbitals. |
| 4. | In an atom, all the five 3d orbitals are equal in energy in free state. |
Subtopic: Shell & Subshell |
57%
Level 3: 35%-60%
NEET - 2022
Hints
If radius of second Bohr orbit of the \(He^+\) ion is 105.8 pm, what is the radius of third Bohr orbit of \(Li^{2+}\) ion?
| 1. | 158.7 Å | 2. | 158.7 pm |
| 3. | 15.87 pm | 4. | 1.587 pm |
Subtopic: Hydrogen Spectra |
78%
Level 2: 60%+
NEET - 2022
Hints
Which one of the following electrons in the ground state will have the least amount of energy?
| 1. | An electron in hydrogen atom. |
| 2. | An electron in 2p orbital of carbon atom. |
| 3. | The electron of copper atom present in 4s orbital. |
| 4. | The outermost electron in sodium atom. |
Subtopic: AUFBAU Principle |
68%
Level 2: 60%+
NEET - 2022
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