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Online Tests
MDCAT Physics Chapter 13 Nuclear Physics of Solids Online Test MCQs With Answers
Question # 1
In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :
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140days
45days
87days
90days
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Question # 2
During a negative ฮฒ-decayv
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An atomic electron is ejected
A neutron in the nucleus decays emitting an electron
An electron which already present within the nucleus is ejected
A part of binding energy of nuclei is converted into electron
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Question # 3
Due to emission of ๐ฐ+ โ ๐๐๐๐:
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Mass of the nucleus increases
Mass of the nucleus decreases
Charge on the nucleus increases
Charge number decreases
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Question # 4
During a negative ฮฒ-decay
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An atomic electron is ejected
A neutron in the nucleus decays emitting an electron
An electron which already present within the nucleus is ejected
A part of binding energy of nuclei is converted into electron
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Question # 5
A thorium nucleus is formed when a uranium nucleus emits an ๐ โparticles. Atomic number of thorium is :
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23
60
90
70
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Question # 6
The mother and daughter elements with the emission of ๐ฐ โ ๐๐๐๐, are called:
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Isotopes
Isobars
Isomers
Isodiapheres
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Question # 7
A radioactive nucleus can emit:
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Electron
๐ผ particles
Positron
Any of these
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Question # 8
The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:
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12days
10days
22days
36days
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Question # 9
The most penetrating radiations out of the following is that of
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๐พ-rays
ฮฒ-rays
ฮฑ-particles
X-rays
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Question # 10
Nuclear fission experiments show that the neutrons the uranium nuclei into two fragment of about the same size. This process is accompanied by the emission of several:
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Protons and positrons
๐ผ โpartilces
neutrons
Protons and ๐ผ โpartilces
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Question # 11
The more readily fissionable isotope of uranium has an atomic mass of:
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220
230
235
240
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Question # 12
In an ๐ โdecay:
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The parent and daughter nuclei have same number of protons
The daughter nucleus has one proton more than parent nucleus
The daughter nucleus has two protons less than parent nucleus
The daughter nucleus has two neutrons more than parent nucleus
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Question # 13
When a radioactive nucleus emits a ๐ฐ โparitcles, the mass number of the atom:
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Increases by one
Decreases by one
Remains the same
Decreases by four
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Question # 14
If the radioactive substance reduces to ๐ ๐๐ PHYSICS of its original mass in 40 days then its half-life is:
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10days
20days
40days
4days
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Question # 15
The fusion of hydrogen into helium is more likely to take place:
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At high temperature and high pressure
At high temperature and low pressure
At low temperature and low pressure
At low temperature and high pressure
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Question # 16
For atomic nucleus, the binding energy per nucleon with increase in mass number:
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Increases continuously
Remains same
Decrease continuously
First increases and then decreases with increase in mass number
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Question # 17
Beta particles have penetration of about:
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100 times more than that of the gamma particles
100 times less than that of an alpha ray
100 times more than that of an alpha ray
10 times more than that of an alpha particle
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Question # 18
Half-life of radon gas is:
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1620 years
3.8 days
7 days
11 days
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Question # 19
Three quarks make up a:
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Leptons
Mesons
Baryons
Quark
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Question # 20
The binding energy per nucleon is:
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Greater for heavy nuclei
Least for heavy nuclei
Greatest for light nuclei
Greatest for medium nuclei
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