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.
Bohr's model of hydrogen atom was proposed in:
A.
1925
B.
1913
C.
1932
D.
1900
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 1913
2.
Which concept did Bohr use from Planck's theory in his atomic model?
A.
Quantization of energy
B.
Wave-particle duality
C.
Heisenberg uncertainty principle
D.
Wave nature of electron
šŸ˜‘ View Answer Rough Work Error
ANSWER :
A. Quantization of energy
3.
According to Bohr's first postulate, electrons in hydrogen atom move in:
A.
Wave-like patterns
B.
Random paths around nucleus
C.
Elliptical orbits only
D.
Fixed circular orbits of definite energy
šŸ˜‘ View Answer Rough Work Error
ANSWER :
D. Fixed circular orbits of definite energy
4.
According to Bohr's model, when does an electron emit or absorb radiation?
A.
Continuously while moving in orbit
B.
Only when transitioning between stationary states
C.
Never, in any condition
D.
Only when moving fast
šŸ˜‘ View Answer Rough Work Error
ANSWER :
B. Only when transitioning between stationary states
5.
Bohr's frequency rule states that frequency Ī½ of emitted/absorbed radiation is:
A.
Ī½ = (Eā‚‚ - Eā‚)/h
B.
Ī½ = (Eā‚‚ + Eā‚)/h
C.
Ī½ = h/(Eā‚‚ - Eā‚)
D.
Ī½ = h(Eā‚‚ - Eā‚)
šŸ˜‘ View Answer Rough Work Error
ANSWER :
A. Ī½ = (Eā‚‚ - Eā‚)/h
6.
According to Bohr, the angular momentum of an electron is:
A.
Quantized in units of h/2Ļ€
B.
Always zero in stable orbit
C.
Continuously variable
D.
Equal to mass Ɨ velocity
šŸ˜‘ View Answer Rough Work Error
ANSWER :
A. Quantized in units of h/2Ļ€