Various Quantum Numbers (Principal, Angular Momentum, and Magnetic Quantum Number, and their Significance) NEET Questions

Physical Chemistry - Atomic Structure

Various Quantum Numbers (Principal, Angular Momentum, and Magnetic Quantum Number, and their Significance) MCQ Questions


1.
The principal quantum number (n) primarily determines:
A.
Only the spin of the electron
B.
Only the orientation of the orbital
C.
Only the shape of the orbital
D.
The size and to a large extent the energy of the orbital
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ANSWER :
D. The size and to a large extent the energy of the orbital
2.
The principal quantum number identifies the:
A.
Orbital orientation
B.
Shell
C.
Spin direction
D.
Subshell
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ANSWER :
B. Shell
3.
The number of allowed orbitals for a given value of 'n' is given by:
A.
2n
B.
n+l
C.
2n²
D.
n squared (n²)
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ANSWER :
D. n squared (n²)
4.
For the M shell, the principal quantum number n equals:
A.
4
B.
1
C.
3
D.
2
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ANSWER :
C. 3
5.
The maximum number of electrons that can be accommodated in a shell with principal quantum number n is:
A.
n+1
B.
2n²
C.
n²
D.
2n
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ANSWER :
B. 2n²
6.
As the value of principal quantum number 'n' increases:
A.
The size of the orbital decreases
B.
The number of electrons decreases
C.
The size of the orbital increases and energy increases
D.
The orbital becomes more spherical
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ANSWER :
C. The size of the orbital increases and energy increases