Bohr Model of a Hydrogen Atom (its Postulates, Derivation of the Relations for the Energy...) NEET Questions

Physical Chemistry - Atomic Structure

Bohr Model of a Hydrogen Atom (its Postulates, Derivation of the Relations for the Energy...) MCQ Questions


1.
Who proposed the atomic model where electrons revolve in fixed orbits?
A.
Thomson
B.
Rutherford
C.
Bohr
D.
Schrödinger
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ANSWER :
C. Bohr
2.
Which of the following is NOT a postulate of Bohr's atomic model?
A.
Quantized orbits
B.
Energy levels
C.
Elliptical orbits
D.
Emission of photons during transitions
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ANSWER :
C. Elliptical orbits
3.
According to Bohr, the angular momentum of an electron is quantized as:
A.
mvr = nh/2π
B.
mvr = h/π
C.
mvr = h/2π
D.
mvr = n/2π
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ANSWER :
A. mvr = nh/2π
4.
The energy of an electron in the nth orbit of hydrogen is proportional to:
A.
1/n²
B.
n²
C.
n
D.
1/n
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ANSWER :
A. 1/n²
5.
The radius of the nth orbit in Bohr’s model is proportional to:
A.
1/n²
B.
n²
C.
1/n
D.
n
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ANSWER :
B. n²
6.
What is the energy of an electron in the first orbit of hydrogen?
A.
-13.6 eV
B.
-10.2 eV
C.
-3.4 eV
D.
-1.51 eV
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ANSWER :
A. -13.6 eV