Dual Nature of Matter NEET Questions

Physical Chemistry - Atomic Structure

Dual Nature of Matter MCQ Questions


7.
What is the de Broglie wavelength of a 0.1 kg ball moving at 10 m/s?
A.
6.626 × 10⁻²⁸ m
B.
6.626 × 10⁻³⁴ m
C.
6.626 × 10⁻³² m
D.
6.626 × 10⁻³⁰ m
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ANSWER :
B. 6.626 × 10⁻³⁴ m
8.
The de Broglie hypothesis was experimentally confirmed by:
A.
Electron diffraction
B.
Black body radiation
C.
Photoelectric effect
D.
Compton effect
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ANSWER :
A. Electron diffraction
9.
The de Broglie wavelength of an electron with momentum p is:
A.
h/p²
B.
h × p
C.
p/h
D.
h/p
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ANSWER :
D. h/p
10.
Which device works on the principle of wave nature of electrons?
A.
Electron microscope
B.
Cathode ray tube
C.
X-ray tube
D.
Photoelectric cell
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ANSWER :
A. Electron microscope
11.
The de Broglie wavelength is inversely proportional to:
A.
Energy
B.
Momentum (m × v)
C.
Velocity only
D.
Mass only
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ANSWER :
B. Momentum (m × v)
12.
If the kinetic energy of a particle is K, its de Broglie wavelength is:
A.
λ = h/(2mK)
B.
λ = h × √(2mK)
C.
λ = h/√(2mK)
D.
λ = √(2mK)/h
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ANSWER :
C. λ = h/√(2mK)