Energy Levels and Hydrogen Spectrum NEET Questions

Physics - Atoms and Nuclei

Energy Levels and Hydrogen Spectrum MCQ Questions


7.
The energy of the fourth excited state (n = 5) of the hydrogen atom is approximately:
A.
−0.378 eV
B.
−0.54 eV
C.
−0.85 eV
D.
−1.51 eV
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ANSWER :
B. −0.54 eV
8.
When n → ∞, the energy of the electron approaches:
A.
−13.6 eV
B.
0 eV (electron is free)
C.
+13.6 eV
D.
−∞ eV
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ANSWER :
B. 0 eV (electron is free)
9.
The minimum energy required to free an electron from the ground state of hydrogen is called:
A.
Ionization energy
B.
Excitation energy
C.
Threshold energy
D.
Work function
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ANSWER :
A. Ionization energy
10.
The ionization energy of the hydrogen atom is:
A.
27.2 eV
B.
3.4 eV
C.
−13.6 eV
D.
13.6 eV
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ANSWER :
D. 13.6 eV
11.
Energy required to excite a hydrogen atom from the ground state (n = 1) to the first excited state (n = 2) is:
A.
10.2 eV
B.
3.40 eV
C.
13.6 eV
D.
12.09 eV
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ANSWER :
A. 10.2 eV
12.
Energy required to excite a hydrogen atom from the ground state (n = 1) to the second excited state (n = 3) is:
A.
13.6 eV
B.
12.09 eV
C.
1.89 eV
D.
10.2 eV
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ANSWER :
B. 12.09 eV