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Q. No.Given below are two statements:
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.
In light of the above statements, choose the correct answer from the options given below:
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
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What is the wavelength of light corresponding to photons with an energy of 1.00 × 103 kJ mol–1?
1. 2.00 × 1031 m
2. 1.20 × 10–7 m
3. 1.20 × 10–4 m
4. 8.36 × 106 m
1. 2.00 × 1031 m
2. 1.20 × 10–7 m
3. 1.20 × 10–4 m
4. 8.36 × 106 m
Subtopic: Photo Electric Effect |
Level 3: 35%-60%
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Hund’s rule states that:
| 1. | No two electrons can be in two separate orbitals. |
| 2. | No two electrons can be present with similar spin in an orbital. |
| 3. | Two electrons can exist in d orbital. |
| 4. | None of the above. |
Subtopic: Pauli's Exclusion Principle & Hund's Rule |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | The mass numbers of most of the elements are fractional. |
| Reason (R): | Mass numbers are obtained by comparing with the mass number of carbon taken as \(12.\) |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False. |
Subtopic: Number of Electron, Proton & Neutron |
Level 3: 35%-60%
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A golf ball has a mass of 46 g and a speed of 45 m/s. If the speed can be measured within the accuracy of 3%, the uncertainty in the position is:
1. 8.4×10-34m
2. 6.4×10-33m
3. 6.6×10-39m
4. 2.1×10-34m
1. 8.4×10-34m
2. 6.4×10-33m
3. 6.6×10-39m
4. 2.1×10-34m
Subtopic: Heisenberg Uncertainty Principle |
58%
Level 3: 35%-60%
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Match List I with List II
Choose the correct answer from the options given below:
| List I (Frequency region) | List II (Uses) |
| A. Radiofrequency | I. Radar |
| B. Microwave | II. Broadcast |
| C. Infra-red region | III. Heating |
| A | B | C | |
| 1. | II | I | III |
| 2. | I | II | III |
| 3. | I | III | II |
| 4. | II | III | I |
Subtopic: Electromagnetic Radiation |
Level 4: Below 35%
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Consider the given two statements:
Select the correct option:
| Assertion (A): | The absorption spectrum consists of some bright lines separated by dark spaces. |
| Reason (R): | The emission spectrum consists of dark lines. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Type of Spectra |
Level 3: 35%-60%
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| Assertion (A): | The energy of an electron is largely determined by its principal quantum number. |
| Reason (R): | The principal quantum number is a measure of the most possible distance of finding the electron around the nucleus. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
Level 3: 35%-60%
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| Assertion (A): | The kinetic energy of photo-electrons increases with an increase in the frequency of incident light where v>v0. |
| Reason (R): | Whenever the intensity of light is increased the number of photo-electron ejected always increases. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Planck's Theory |
Level 4: Below 35%
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| Assertion (A): | Angular momentum of the electron in the orbit that has four subshells is \(2h\over\pi\). |
| Reason (R): | Angular momentum of the electron is quantized. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Bohr's Theory |
Level 4: Below 35%
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