Q.1
Absorption/scattering cross-section of an element is expressed in "barn", which is equivalent to
Q.2
U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.
Q.3
Thorium⁻²32 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.
Q.4
The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight.
Q.5
In the nuclear reaction, 93N239 → 93Pu239 + ?; the missing particle is a/an
Q.6
Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.
Q.7
Energy equivlant to one atomic mass unit (amu) is __________ MeV.
Q.8
Percentage of the heavy water in ordi water is around
Q.9
Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.
Q.10
Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.
Q.11
Heavy water plant is not located at
Q.12
Out of the following places, heavy water plant is not located at
Q.13
Heavy water plant is not located at
Q.14
An element having large number of __________ is most easily subjected to nuclear fission.
Q.15
Sodium melts (at atmospheric pressure) at a temperature of __________ °C.
Q.16
Which of the following accounts for the maximum energy release in the nuclear fission process?
Q.17
Radioactivity of an isotope is expressed in
Q.18
Out of the followingplaces, a nuclear power plant is not located at
Q.19
The most abundant isotope of natural uranium is
Q.20
Which of the following is artificially produced as it does not occur in nature?
Q.21
Function of control rod in a nuclear reactor is to control
Q.22
In nuclear reactions, __________ number is conserved.
Q.23
The atomic number of an element is equal to the number of __________ present in its atom.
Q.24
The emission of an a-particle causes the resultant nucleus to have
Q.25
The radioisotope used to study the thyroid gland is
Q.26
Nuclear power plant is not located at
Q.27
The disintegration rate of a radioactive element
Q.28
Atoms with same number of neutrons, but different number of nucleons are called
Q.29
The mass number of an element is equal to the number of __________ in the nucleus.
Q.30
Hydrogen bomb employs the nuclear fusion of
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