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MDCAT Physics Chapter 13 Nuclear Physics of Solids Online Test MCQs With Answers
Question # 1
The example of nuclear fusion is:
Choose an answer
Formation of barium and krypton from uranium
Formation of plutonium -235 from uranium -235
Formation of helium from hydrogen
Formation of water from hydrogen and oxygen
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Question # 2
Three quarks make up a:
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Leptons
Mesons
Baryons
Quark
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Question # 3
A radioactive isotope πππ πΌ decays consecutively to πππ πΌ the particles emitted are:
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One πΌ and one π½
Two πΌ and one π½
e πΌ and two π½
Two πΌ and two π½
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Question # 4
The number of electrons in a nucleus X of atomic number Z and mass number A is:
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A
W
Z
Y
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Question # 5
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 # 6
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 # 7
The activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:
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0.8 Curie
0.1Curie
0.4 Curie
0.16 Curie
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Question # 8
A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:
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20min
60min
80min
90min
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Question # 9
Because of large mass when π βparicle enters the atom or molecule it:
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Moves in zigzag path
Moves along straight line
Moves along circular path
None of these
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Question # 10
The mother and daughter elements with the emission of π° β ππππ, are called:
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Isotopes
Isobars
Isomers
Isodiapheres
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Question # 11
Half-life of radon gas is:
Choose an answer
1620 years
3.8 days
7 days
11 days
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Question # 12
The most penetrating radiations out of the following is that of
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πΎ-rays
Ξ²-rays
Ξ±-particles
X-rays
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Question # 13
The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:
Choose an answer
1.75 days
3.5 days
7 days
14 days
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Question # 14
When a radioactive nucleus remits a beta particle, the proton neutron ratio:
Choose an answer
Decreases
Increases
Remain same
None of the above
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Question # 15
In an π βdecay:
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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 # 16
The particles equal in mass or greater than mass of protons are called:
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Leptons
Mesons
Baryons
Quarks
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Question # 17
A radioactive nucleus can emit:
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Electron
πΌ particles
Positron
Any of these
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Question # 18
A thorium nucleus is formed when a uranium nucleus emits an π βparticles. Atomic number of thorium is :
Choose an answer
23
60
90
70
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Question # 19
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 # 20
The fusion of hydrogen into helium is more likely to take place:
Choose an answer
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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