Bohr Model NEET Questions

Physics - Atoms and Nuclei

Bohr Model MCQ Questions


13.
Which postulate of Bohr’s atomic model explains the stability of atoms?

NEET - 2017

A.
Electrons continuously radiate energy
B.
Electrons revolve in discrete orbits
C.
Atoms contain neutrons
D.
Nucleus contains protons and electrons
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ANSWER :
B. Electrons revolve in discrete orbits
14.
The quantization of angular momentum in Bohr’s model is given by ___.
A.
nh
B.
n/π
C.
nh/2π
D.
nh/4π
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ANSWER :
C. nh/2π
15.
Bohr’s second postulate states that an electron emits or absorbs energy when ___.
A.
It remains stationary
B.
It moves to a lower orbit
C.
It collides with the nucleus
D.
It jumps to a higher orbit
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ANSWER :
B. It moves to a lower orbit
16.
The shortest wavelength in the hydrogen spectrum is associated with which transition?
A.
Lyman series
B.
Balmer series
C.
Pfund series
D.
Paschen series
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ANSWER :
A. Lyman series
17.
What is the expression for the radius of an electron orbit in a hydrogen atom, according to Bohr’s model?

NEET - 2018

A.
r ∝ n²
B.
r ∝ 1/n²
C.
r ∝ n
D.
r ∝ 1/n
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ANSWER :
A. r ∝ n²
18.
What is the angular momentum of an electron in the second orbit of hydrogen?
A.
2h/π
B.
h/2π
C.
h
D.
h/π
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ANSWER :
B. h/2π