The pair of ions having the same electronic configuration is -
1. Cr3+, Fe3+
2. Fe3+, Mn2+
3. Fe3+, Co3+
4. Sc3+, Cr3+
For the electrons of an oxygen atom. The correct statement among the following is :
1. | Zeff for an electron in a 2s orbital is the same as Zeff for an electron in a 2p orbital. |
2. | An electron in the 2s orbital has the same energy as an electron in the 2p orbital. |
3. | Zeff for an electron in 1s orbital is the same as Zeff for an electron in a 2s orbital |
4. | The two electrons present in the 2s orbital have same spin quantum numbers ms but of opposite sign |
Identify the matter waves with the shortest wavelength when traveling at the same speeds :
1. | Electron | 2. | Alpha particle (He2+) |
3. | Neutron | 4. | Proton |
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 |
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 |
Match the ensuing rules with the corresponding statements:
Rules | Statements | ||
A. | Hund’s Rule | 1. | No two electrons in an atom can have the same set of four quantum numbers. |
B. | Aufbau Principle | 2. | Half-filled and completely filled orbitals have extra stability. |
C. | Pauli's Exclusion Principle | 3. | 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 | 4. | It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously. |
5. | In the ground state of atoms, orbitals are filled in the order of their increasing energies. |
A | B | C | D | |
1. | 3 | 5 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 3 | 5 | 1 | 4 |
4. | 4 | 5 | 3 | 2 |
Match the following:
Column I | Column II | ||
A. | X-rays | 1. | |
B. | Ultraviolet wave (UV) | 2. | |
C. | Long radio waves | 3. | |
D. | Microwave | 4. |
A | B | C | D | |
1. | 4 | 1 | 3 | 2 |
2. | 1 | 4 | 2 | 3 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 3 | 1 | 2 |
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 |
Match species are given in Column I with the electronic configuration given in Column II :
Column I |
Column II |
||
A. |
Cr |
1. | |
B. |
Fe2+ |
2. | |
C. |
Ni2+ |
3. | |
D. |
Cu |
4. | |
5. |
Codes:
Options: | A | B | C | D |
1. | 4 | 3 | 1 | 2 |
2. | 1 | 2 | 3 | 5 |
3. | 5 | 4 | 3 | 2 |
4. | 4 | 5 | 3 | 2 |
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. |