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Online Tests
Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
The number if neutrons in the nucleus of
92
U
235
are
Choose an answer
Infinite
92
235
143
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Question # 2
Phenomenon of radioactivity is due to disintegration of
Choose an answer
nucleus
neutron
proton
molecule
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Question # 3
Marie curie and Pierre curie discovered:
Choose an answer
Uranium
Polonium
Radium
Both (A) and (C)
Plutonium
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Question # 4
Radioactivity is
Choose an answer
self disruptive activity
spontaneous activity
exhibited by all elements under proper conditions
both 'a' and 'b'
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Question # 5
Examples of moderators used in a fission reactor is/are:
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Water
Heavy water
Carbon
Hydrocarbon
All of these
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Question # 6
When thorium nucleus emits aβ-particle, the daughter nucleus is called:
Choose an answer
Protactinium
Actinium
Uranium
Radium
Redon
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Question # 7
Gamma rays consist of steam of
Choose an answer
electron
proton
photons
all of these
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Question # 8
Radioactivity
Choose an answer
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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Question # 9
β-particles are easily deflected by collisions than heavy
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α-particles
β-particles
γ-particles
none of these
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Question # 10
Binding energy per nucleus is
Choose an answer
greater for heavy nucleus
least for heavy nucleus
greatest for light nuclei
decreases for medium weight niclei
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Question # 11
Neutron was disvovered by:
Choose an answer
Rutherford in 1920
Chadwick in 1922
Bohr in 1913
Compton in 1927
None of these
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Question # 12
Rutherford performed an experiment on nuclear reactions in:
Choose an answer
1718 A.D
1818 A.D
1918 A.D
2001 A.D.
1701 A.D.
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Question # 13
Rate of decay is actually described by.
Choose an answer
Half line
Decay constant
Mean life
Total life
None of these
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Question # 14
The emission of radiations take place in elements, having charge number greater than
Choose an answer
109
82
69
52
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Question # 15
For Protium, the mass defect is:
Choose an answer
Infinite
Zero
Very large
A few grams
None of these
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Question # 16
Electrons are
Choose an answer
positive charged
negatively charged
massless
neutral
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