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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
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 # 2
The figure 1.007276μ shows the mass of an:
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Atom
Positron
Electron
Neutron
Proton
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Question # 3
The nucleus left after the emission of some radiation is called:
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Parent nucleus
Daughter necleus
Mother necleus
Any of these
None of these
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Question # 4
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 # 5
Which of the following material has smaller has life
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uranium
polonium
radium
radian
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Question # 6
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 # 7
There is present in paraffin a large amount of:
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Nitrogen
Hydrogen
Carbon
Baryllium
Lithium
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Question # 8
1 amu is equal to
Choose an answer
1.66 x 10
-24
kg
1.66 x 10
-19
kg
1.66 x 10
-34
kg
1.66 x 10
-27
kg
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Question # 9
Mass of neutron is
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1.67 x 10
-31
kg
1.67 x 10
-27
kg
9.1 x 10
-31
kg
1.67 x 10
-
19kg
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Question # 10
In 1932 Chadwick discovered
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proton
neutron
photon
electron
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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
The energy is found from Einstein's mass energy relation is called
Choose an answer
binding energy of electron
binding energy of proton
binding energy of neutron
binding energy of nucleus
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Question # 13
γ-rays behave like a particle because they explain the
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Compton effect
Photoelectric effect
Pair-production
all the above
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Question # 14
The nuclei of an element having the same charge number but different mass numbers are called:
Choose an answer
Isobars
Isotopes
Isomers
Isobaric
Isothermal
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Question # 15
The isotope/s of hydrogen is /are:
Choose an answer
Protium
Deuterium
Tritium
Both (A) and (B)
All of these
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Question # 16
U-238 present in the natural uranium is about:
Choose an answer
59%
0.007%
99%
39%
19%
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