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Quantum Mechanical Model of Atom MCQs
1. Write the values for l, n, and m for Ψ3,1,0?
a) 1, 3, 0
b) 3, 1, 0
c) 0, 3, 1
d) 1, 0, 3
Answer: 1, 3, 0
2. How many electrons can exist with the principal quantum number’s value as 4?
a) 16
b) 4
c) 32
d) 12
Answer: 32
3. No two electrons have the same set of all four quantum numbers.
a) True
b) False
Answer: True
4. According to the Aufbau’s principle, which of the following orbital should be filled first?
a) 5d
b) 4p
c) 3p
d) 2s
Answer: 2s
5. Which of the following set of quantum numbers is not valid?
a) n = 5, l = 2, m = 0, s = 1/2
b) n = 1, l = 2, m = 0, s = 1/2
c) n = 5, l = 3, m = 2, s = 1/2
d) n = 5, l = 2, m = 0, s = -1/2
Answer: n = 1, l = 2, m = 0, s = 1/2
6. Total number of nodes for 3d orbital is ________
a) 3
b) 2
c) 1
d) 0
Answer: 2
7. What is the magnetic quantum number of the orbital 2pz?
a) 1
b) ±1
c) -1
d) 0
Answer: 0
8. What is the shape the orbital, whose “l” is 1?
a) Spherical
b) Dumbbell
c) Double dumbbell
d) Complex
Answer: Dumbbell
9. The principal quantum number describes ____
a) energy and size of the orbit
b) the shape of the orbital
c) spatial orientation of the orbital
d) the spin of the electron
Answer: energy and size of the orbit
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Categories: Structure of Atom
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