Q. No.Chlorine exists in two isotopic forms, Cl-37 and Cl-35, but its atomic mass is 35.5. This indicates the ratio of Cl-37 and Cl-35 is approximately:
1. 1:2
2. 1:1
3. 1:3
4. 3:1
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 |
Codes
| 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 |
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