Quantum Numbers(General Knowledge > General Science ) Questions and Answers

Question 1. Which of the following sub levels does not exist
  1.    2p
  2.    3d
  3.    2d
  4.    4f
Explanation:-
Answer: Option C. -> 2d
Question 2. What is the maximum number of electrons that contain the values n=4 l=3
  1.    6
  2.    10
  3.    14
  4.    18
Explanation:-
Answer: Option C. -> 14
Question 3. What quantum number describes the energy level of an orbital?
  1.    l
  2.    m
  3.    s
  4.    n
Explanation:-
Answer: Option D. -> n
Question 4. How many total electrons can the f orbitals in a sublevel hold?
  1.    2
  2.    14
  3.    6
  4.    10
Explanation:-
Answer: Option B. -> 14
Question 5. How many orbitals (including sub orbitals) are found in a shell with n = 2?
  1.    2
  2.    3
  3.    4
  4.    Both A & B
Explanation:-
Answer: Option C. -> 4
Question 6. Which rule shows us that we have to add electrons singly to orbitals until each has one before we start pairing?
  1.    Hund's Rule
  2.    Pauli Exclusion
  3.    Aufbau Principle
  4.    Paschen Series
Explanation:-
Answer: Option A. -> Hund's Rule
Question 7. How many 4d orbitals are there in an atom?
  1.    1
  2.    3
  3.    5
  4.    none of the above
Explanation:-
Answer: Option C. -> 5
Question 8. Which set of Quantum numbers is not allowed
  1.    (3,1,1,-1/2)
  2.    (2,1,-2,+1/2)
  3.    (4,2,-1,-1/2)
  4.    none of the above
Explanation:-
Answer: Option B. -> (2,1,-2,+1/2)
Question 9. Which orbitals cannot exist
  1.    3p
  2.    4d
  3.    3f
  4.    6s
Explanation:-
Answer: Option C. -> 3f
Question 10. The maximum number of electrons with quantum numbers with n=3 and l=2 is
  1.    2
  2.    4
  3.    6
  4.    10
Explanation:-
Answer: Option D. -> 10
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