Q.1
The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
Q.2
Neutrons have mass approximately equal to that of __________ atoms.
Q.3
A nuclear reactor can't be used for
Q.4
Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission.
Q.5
The ratio of atomic radius to its nuclear radius is about
Q.6
Both tritium and deuterium have the same number of
Q.7
The second underground nuclear test was conducted by India at
Q.8
The first underground nuclear test was conducted by India at
Q.9
Solar energy results from __________ reaction.
Q.10
Pick out the wrong statement.
Q.11
Coolant present in the primary circuit of a pressurised water reactor is high pressure
Q.12
The atomic number of a radioactive element is not changed, when it emits __________ rays.
Q.13
Thorium can be converted into U-233 in a __________ reactor.
Q.14
Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material).
Q.15
In a nuclear explosion, the energy is released primarily in the form of __________ energy.
Q.16
The largest stable nucleus is
Q.17
Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is
Q.18
Unit of radioactivity is
Q.19
Which of the following is the best nuclear fuel?
Q.20
The main ore of thorium is
Q.21
The main ore of uranium is
Q.22
Fast breeder Test Reactor (FBTR) is located at
Q.23
Pick out the wrong statement.
Q.24
Uranium percentage in monazite sand is about
Q.25
The number of neutrons in the nucleus of Uranium⁻²33 (92U233) is
Q.26
A fast breeder reactor employs
Q.27
In β-decay of radioactive material, the ratio of neutron to proton
Q.28
Thorium metal
Q.29
A radioactive isotope undergoes decay with respect to time following __________ law.
Q.30
Tarapur atomic power station
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