Energy Levels and Hydrogen Spectrum NEET Questions

Physics - Atoms and Nuclei

Energy Levels and Hydrogen Spectrum MCQ Questions


13.
Energy required to excite a hydrogen atom from n = 1 to n = 4 is:
A.
12.09 eV
B.
12.75 eV
C.
13.6 eV
D.
10.2 eV
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ANSWER :
B. 12.75 eV
14.
Energy required to excite a hydrogen atom from n = 2 to n = 3 is:
A.
0.66 eV
B.
10.2 eV
C.
1.89 eV
D.
12.09 eV
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ANSWER :
C. 1.89 eV
15.
The energy required to excite a hydrogen atom from n = 3 to n = 4 is:
A.
12.75 eV
B.
0.66 eV
C.
1.89 eV
D.
0.31 eV
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ANSWER :
B. 0.66 eV
16.
On the energy level diagram, the energy levels of a hydrogen atom:
A.
Get closer as n increases
B.
Are equally spaced
C.
Have no pattern
D.
Get farther as n increases
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ANSWER :
A. Get closer as n increases
17.
The principal quantum number n labels the stationary states in the:
A.
Ascending order of energy
B.
Random order
C.
Order of orbital radius only
D.
Descending order of energy
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ANSWER :
A. Ascending order of energy
18.
At room temperature, most hydrogen atoms are in the:
A.
n = ∞ state
B.
Ground state (n = 1)
C.
Ionized state
D.
First excited state (n = 2)
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ANSWER :
B. Ground state (n = 1)