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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
Marie curie and Pierre curie discovered:
Choose an answer
Uranium
Polonium
Radium
Both (A) and (C)
Plutonium
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Question # 2
In radioactive decay, the new element which is formed due to the disintegration of original element is called
Choose an answer
element
daughter element
parent element
none of these
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Question # 3
In radio-active decay, the original element which disintegrate to another element is called
Choose an answer
element
daughter element
parent element
none of these
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Question # 4
When certain nucleus emits aβ-particles, is mass number:
Choose an answer
Remain same
Increases by one
Decreases by one
Decreases by four
None of these
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Question # 5
The counter, which also provides the power to the G.M. tube is called:
Choose an answer
Thin mica window
thin glass window
Airy window
Wooden window
None of these
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Question # 6
The chemical properties of all the isotopes of an elements are
Choose an answer
same
different
slightly different
none of these
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Question # 7
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 # 8
Charge on proton is
Choose an answer
1.59 x 10
-9
C
1.59 x 10
-7
C
-1.59 x 10
-19
C
1.59 x 10
-19
C
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Question # 9
An alpha particle has a charge of
Choose an answer
+2e
-2e
-e
+3e
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Question # 10
The figure 1.007276μ shows the mass of an:
Choose an answer
Atom
Positron
Electron
Neutron
Proton
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Question # 11
The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
Choose an answer
nuclear fission
nuclear fusion
man defect
radioactivity
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Question # 12
The energy acquired by a mass of 1g moving with the speed of light is
Choose an answer
3 x 10
8
J
9 x 10
13
J
3 x 10
13
J
9 x 10
16
J
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Question # 13
Referring to the above figure, we can say that of all the elements, the most stable element is
Choose an answer
Phosphours
Iron
uranium
Lithium
Bismuth
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Question # 14
Mass of proton is of order of
Choose an answer
10
-31
gm
10
-27
kg
10
-24
gm
10
+27
kg
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Question # 15
The half life of radioactive substances depends upon
Choose an answer
amount of substance
energy of substance
state of substance
temperature of substance
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Question # 16
The half lie of radium-226 is
Choose an answer
238 years
4.5 x 10
9
days
1620 years
332 years
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