Dual Nature of Matter NEET Questions

Physical Chemistry - Atomic Structure

Dual Nature of Matter MCQ Questions


13.
The De Broglie wavelength of a macroscopic object like a ball is:
A.
Very large
B.
Comparable to atomic size
C.
Negligible
D.
Infinite
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ANSWER :
C. Negligible
14.
De Broglie wavelength of a particle with kinetic energy K is given by:
A.
h / sqrt(2mK)
B.
h / (2mK)
C.
hK / (2m)
D.
(2mK) / h
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ANSWER :
A. h / sqrt(2mK)
15.
If an electron has a wavelength of 2 Å, what is its approximate momentum?
A.
3.3 × 10⁻²⁴ kg m/s
B.
6.6 × 10⁻³⁴ kg m/s
C.
1.1 × 10⁻²⁷ kg m/s
D.
2.2 × 10⁻²⁶ kg m/s
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ANSWER :
A. 3.3 × 10⁻²⁴ kg m/s
16.
According to De Broglie hypothesis, every moving particle has:
A.
A fixed wavelength
B.
A variable mass
C.
A wave associated with it
D.
Zero charge
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ANSWER :
C. A wave associated with it
17.
Davisson and Germer experiment confirmed the presence of:
A.
Protons
B.
Wave nature of electrons
C.
Photons
D.
Quarks
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ANSWER :
B. Wave nature of electrons
18.
What is the significance of De Broglie’s equation?
A.
Explains the structure of the atom
B.
Unifies wave and particle nature
C.
Only applies to electrons
D.
Explains blackbody radiation
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ANSWER :
B. Unifies wave and particle nature