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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
Neutron was discovered by
Choose an answer
Curie
Roentgen
Chadwick
Rutherford
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Question # 2
In his experiment on nuclear reactions, Rutherford bombardedĪ± particles on:
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Nitrogen
Hydrogen
Lead
Oxygen
Krypton
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Question # 3
The most abundant isotope of neon is
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neon-20
neon-21
neon-22
neon-23
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Question # 4
Which are not the elementary particles?
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Photons
Leptons
Hadrons
Quarks
None of these
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Question # 5
In wilson cloud chamber, the air becomes saturated with:
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Alcohol vapours
Water
Helium gas
Nitrogen gas
None of these
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Question # 6
Radioactivity was discovered by:
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Becquerel
Marie curie
Pierre curie
All of them
None of these
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Question # 7
Charge on neutron is
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1.6 x 10
-19
C
zero
-1.6 x 10
-19
C
1.2 x 10
-19
C
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Question # 8
The amount of energy equivalent to 1 a.m.u is
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9.315 Mev
93.15 Mev
931.5 Mev
2.22 Mev
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Question # 9
Three quarks make:
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An electron
A meson
A baryon
A photon
None of these
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Question # 10
For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
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A - Z
A + Z
Z
A
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Question # 11
How many isotopes of helium are present?
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1
2
3
4
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Question # 12
The unit of decay constant is:
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Second
Metre
Hour
Year
Second
-1
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Question # 13
Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
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50
100
150
200
250
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Question # 14
When certain nucleus emits anĪ± particle, its mass number:
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Increases by one
Decreases by one
Remain same
Decreases by four
None of these
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Question # 15
Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
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deuterium
protium
tritium
none of these
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Question # 16
If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
Choose an answer
-4
4
2
1
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Question # 17
Radioactivity
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is exhibited more by semiconductors in general
in exhibited more by the element when they are coupled
with other radioactive elements by a covalent bond
is an atomic property of radioactive elements
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