- 1(current)
Q. No.| Assertion (A): | Helium and berylium having the similar outer electronic configuration of type \(ns^2\). |
| Reason (R): | Both are chemically inert. |
| 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following rules with their 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. In the ground state of atoms, orbitals are filled in the order of their increasing energies. |
|
C. Pauli 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. |
|
|
|
Correct option is:
1) A-1,B-2,C-3,D-4
2) A-1,B-3,C-2,D-4
3) A-3,B-2,C-1,D-4
4) A-3,B-1,C-2,D-4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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