Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?
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Heavy water (D2O) in a nuclear reactor serves as a
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Moderating material used in a thermal-reactor should be a
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The 92U238 emits an a-particle. The product is
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Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher
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__________ have the same mass number, but different nuclear charge.
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Water is a better coolant than a gas (like CO2, He, N2 etc.), because it
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Which is the most commonly used molten metal for cooling of nuclear reactors?
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Radioactive decay is a __________ change.
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Heavy water used in the nuclear reactors to slow down the speed of neutrons is
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Hydrogen bomb employs the nuclear fusion of
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Use of molten metal as a coolant in fast breeder reactor helps in
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Fuel for a fast breeder reactor is
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Uranium is recovered from its ore (pitchblende) by
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The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
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Which of the following is the most harmful for the human being?
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Coolant used in a boiling water reactor is
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The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
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Extraction of uranium from its ore is done by __________ method.
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Graphite is used in nuclear reactor as
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