A. Thorium
B. Plutonium
C. Uranium
D. None of these
Correct Answer: Thorium ✔
Last Updated: March 07, 2019
Related MCQs
- 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) ?
- Out of the following, nucleus of __________ atom contains the largest number of neutrons?
- The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent?
- Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays?
- Which of the following is a moderating material used in nuclear reactor ?
- Uranium percentage in monazite sand is about__________?
- The main ore of thorium is__________?
- Fuel for a fast breeder reactor is__________?
- Fast breeder reactors do not__________?
- Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent?
- Extraction of uranium from its ore is done using __________ methods?
- The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second?
- Unit of radioactivity is__________?
- Gas cooling as compared to water cooling of nuclear reactors__________?
- Which of the following nuclear materials is fissile ?
- The ratio of atomic radius to its nuclear radius is about__________?
- Isotopes of an element have different__________?
- A moderator __________ the neutrons?
- The atomic number of a radioactive element is not changed, when it emits __________ rays?
- Extraction of uranium from its ore is done by __________ method?
- The most abundant isotope of natural uranium is __________?
- A boiling water reactor is the one, in which the__________?
- Heavy water (D2O) in a nuclear reactor serves as a__________?
- The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is__________?
- In a nuclear explosion, the energy is released primarily in the form of __________ energy?
- What is the average life of a radioactive atom having a ‘half life period’ of T ?