A. Uranium
B. Polonium
C. Hafnium
D. Thorium
Correct Answer: Thorium ✔
Last Updated: March 07, 2019
Related MCQs
- Research reactors are normally meant for__________?
- Artificially produced radioactive isotopes are used for__________?
- Which one is different for the neutral atoms of the isotopes of an element ?
- Uranium is recovered from its ore (pitchblende) by__________?
- Which of the following is not an ore of uranium ?
- “Critical mass” is the minimum mass of nuclear fissile material required for the__________?
- When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as__________?
- Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher __________?
- Radioactivity of an isotope is expressed in__________?
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- The mass number of an element is not changed, when it emits __________ radiations?
- The half life period of a radioactive element depends upon the__________?
- The half life period of a radioactive element depends on its __________?
- Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage?
- H2 is a better coolant than CO2, due to it‟s relatively__________?
- Which of the following accounts for the maximum energy release in the nuclear fission process ?
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- In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous __________?
- Enrichment of uranium is done to increase the concentration of __________ in the natural uranium?
- A pressurised water reactor (PWR) uses pressurised water as a__________?
- Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission?
- Hydrogen has __________ isotopes?
- Which of the following is not used as a moderator in nuclear reactor ?
- Which is not a fissile nuclear material ?
- Fast breeder reactors are most usable in India, because of our largest __________ deposits?
- An electron has a mass that is approximately __________ that of the proton?
- Which of the following reactors is operated at high neutron flux and low power level ?
- Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to__________?
- Isotopes of an element have different__________?
- Thorium metal__________?
- Which of the following isotopes is not present in natural uranium?
- U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent?
- Thorium-232 is converted into uranium-233 in a/an __________ nuclear reactor?
- Nuclides having the same atomic numbers are termed as__________?
- The size of an atom is of the order of one __________?
- The atomic mass of an element is fractional, because __________?
- “Critical mass” is the minimum mass of nuclear fissile material required for the__________?
- The atomic number of an element is equal to the number of __________ present in its atom?
- Radioactive decay is a __________ change?
- The mass number of an element is equal to the number of __________ in the nucleus?
- __________ have the same mass number, but different nuclear charge ?
- Energy produced in the nuclear fission is of the order of __________ MeV?
- Which is the most commonly used molten metal for cooling of nuclear reactors ?
- Percentage of the heavy water in ordinary water is around __________?
- The 92U238 emits an a-particle. The product is__________?
- Coolant used in a boiling water reactor is__________?
- The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is __________?
- A radioactive substance does not emit__________?
- Thermal shield is used in high powered nuclear reactors to__________?
- Commercial power generation from fusion reactor is not yet possible, because__________?
- Molten sodium (as a coolant in fast breeder reactor) ?