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Q. No.Consider the given two statements:
| Assertion (A): | All d orbitals are tetra-lobed structures having two nodal planes. |
| Reason (R): | Out of five, only four d-orbitals are degenerate orbitals. |
| 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: Shell & Subshell |
55%
Level 3: 35%-60%
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Match the following rules with their statements:
| Rules: | Statements: | ||
| A. | Hund’s Rule | (i) | No two electrons in an atom can have the same set of four quantum numbers. |
| B. | Aufbau Principle | (ii) | In the ground state of atoms, orbitals are filled in the order of their increasing energies. |
| C. | Pauli Exclusion Principle | (iii) | Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied. |
| D. | Heisenberg’s Uncertainty Principle | (iv) | It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously. |
Correct option is:
1. A-(i),B-(ii),C-(iii),D-(iv)
2. A-(i),B-(iii),C-(ii),D-(iv)
3. A-(iii),B-(ii),C-(i),D-(iv)
4. A-(iii),B-(i),C-(ii),D-(iv)
Subtopic: Pauli's Exclusion Principle & Hund's Rule | AUFBAU Principle |
82%
Level 1: 80%+
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Match the following species with their corresponding ground state electronic configuration.
| Atom/Ion | Electronic configuration | ||
| A. | Cu | 1. | |
| B. | Cu2+ | 2. | |
| C. | Zn2+ | 3. | |
| D. | Cr3+ | 4. | |
| 5. |
| A | B | C | D | |
| 1. | 4 | 2 | 5 | 1 |
| 2. | 3 | 4 | 1 | 5 |
| 3. | 3 | 2 | 1 | 4 |
| 4. | 4 | 2 | 1 | 3 |
Subtopic: Pauli's Exclusion Principle & Hund's Rule |
88%
Level 1: 80%+
Hints
Match the quantum numbers with the information provided by them:
| Quantum number | Information provided | ||
| A. | Principal quantum number | 1. | Orientation of the orbital |
| B. | Azimuthal quantum number | 2. | Energy and size of orbital |
| C. | Magnetic quantum number | 3. | Spin of electron |
| D. | Spin quantum number | 4. | Shape of the orbital |
| A | B | C | D | |
| 1. | 2 | 4 | 1 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
91%
Level 1: 80%+
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Match types of wave in Column-I with the corresponding frequency in Column-II and mark the appropriate option:
|
Column-I
(Types of Wave)
|
Column-II (Corresponding Frequency) |
||
| A. | X-rays | I. | |
| B. | Ultraviolet wave (UV) | II. | |
| C. | Long radio waves | III. | |
| D. | Microwave | IV. |
| A | B | C | D | |
| 1. | IV | I | III | II |
| 2. | I | IV | II | III |
| 3. | I | IV | III | II |
| 4. | IV | III | I | II |
Subtopic: Electromagnetic Radiation |
77%
Level 2: 60%+
Hints
Match the following.
|
Column I |
Column II |
||
| A. |
Photon |
1. |
Value is 4 for N-shell |
| B. |
Electron |
2. |
Probability density |
| C. | 3. |
Always positive value |
|
| D. |
Principle quantum number n |
4. |
Exhibits both momentum and wavelength |
Options:
| A | B | C | D | |
| 1. | 4 | 4 | 2,3 | 1,3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2,1 | 4 | 3 | 2,3 |
| 4. | 4 | 5 | 3 | 2 |
Subtopic: Quantum Numbers & Schrodinger Wave Equation |
89%
Level 1: 80%+
Hints
| Assertion (A): | All isotopes of a given element show the same type of chemical behaviour. |
| Reason (R): | The chemical properties of an atom are controlled by the number of electrons in the atom. |
| 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: Number of Electron, Proton & Neutron |
65%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | An ideal black body emits and absorbs radiation of every possible frequency. |
| Reason (R): | An increase in the temperature of a body causes its radiation spectrum to peak at progressively higher frequencies. |
| 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 |
50%
Level 3: 35%-60%
Hints
| Assertion (A): | It is impossible to determine the exact position and exact momentum of an electron simultaneously. |
| Reason (R): | The path of an electron in an atom is clearly defined. |
| 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: Heisenberg Uncertainty Principle |
76%
Level 2: 60%+
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Given below are two statements:
In light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | Bohr’s orbits are also called stationary states. |
| Reason (R): | Electrons are stationary in an orbit. |
| 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 |
70%
Level 2: 60%+
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