Heisenberg Uncertainty Principle NEET Questions

Physical Chemistry - Atomic Structure

Heisenberg Uncertainty Principle MCQ Questions


13.
An electron's position is determined with uncertainty of 5.0 × 10⁻¹¹ m. Calculate the minimum uncertainty in momentum:
A.
1.05 × 10⁻²⁶ kg·m/s
B.
1.05 × 10⁻²² kg·m/s
C.
1.05 × 10⁻²⁰ kg·m/s
D.
1.05 × 10⁻²⁴ kg·m/s
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ANSWER :
D. 1.05 × 10⁻²⁴ kg·m/s
14.
Heisenberg's uncertainty principle was a major reason for the failure of:
A.
Quantum mechanics
B.
Bohr's model of atom
C.
Schrödinger equation
D.
Planck's quantum theory
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ANSWER :
B. Bohr's model of atom
15.
If Δx · Δv = h/(4πm), then what is the value of (Δx · Δp)?
A.
h
B.
h·m
C.
h/4π
D.
h/2π
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ANSWER :
C. h/4π
16.
The uncertainty in the position and velocity of a particle are 10⁻¹⁰ m and 5.27 × 10⁻²⁴ m/s respectively. The mass of the particle (in kg) is:
A.
0.05 kg
B.
0.1 kg
C.
0.5 kg
D.
1.0 kg
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ANSWER :
B. 0.1 kg
17.
An electron has speed 600 m/s with accuracy of 0.005%. Calculate the minimum uncertainty in finding its position:
A.
1.92 × 10⁻¹ m
B.
1.92 × 10⁻⁵ m
C.
1.92 × 10⁻⁷ m
D.
1.92 × 10⁻³ m
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ANSWER :
D. 1.92 × 10⁻³ m
18.
Which of the following statements is correct?
A.
Heisenberg's principle is significant only for microscopic particles
B.
Heisenberg's principle is applicable to all objects in the universe
C.
Heisenberg's principle is applicable only to electrons
D.
Heisenberg's principle gives exact value of position and momentum
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ANSWER :
A. Heisenberg's principle is significant only for microscopic particles