76. Which of the following is the best nuclear fuel?
77. Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?
78. Which of the following accounts for the maximum energy release in the nuclear fission process ?
79. In a pressurised water reactor (PWR), the
80. Liquid metal (e.g, . molten sodium) is preferred as a coolant in case of a/an __________ reactor.
81. Coolant used in a boiling water reactor is
82. A thermal nuclear reactor compared to a fast breeder reactor
83. The phenomenon of nuclear fission is opposite to that of
84. An ideal coolant for a nuclear reactor should
85. The size of an atom is of the order of one
86. 'Light water' used as a coolant in nuclear reactor is nothing but
87. Isotopes of an element have different
88. The emission of an a-particle causes the resultant nucleus to have
89. Solar energy results from __________ reaction.
90. In nuclear reactions, __________ number is conserved.
91. The molecular weight of heavy water is
92. Which of the following is not a good moderating material ?
93. Plutonium
94. A control rod
95. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is
96. Enriched uranium means that, it contains
97. The radioisotope used to study the thyroid gland is
98. The mass number of an element is equal to the number of __________ in the nucleus.
99. The half life period of a radioactive element depends upon the