Unit of radioactivity is__________________?
Unit of radioactivity is__________________?
A. Barn
B. Fermi
C. Angstrom
D. Curie
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‘Light water’ used as a coolant in nuclear reactor is nothing but______________________?
‘Light water’ used as a coolant in nuclear reactor is nothing but______________________?A. Ordinary water
B. Mildly acidic (pH = 6) water
C. Mildly alkaline (pH = 8) water
D. None of theseAtoms of U-238 and U-235 differ in structure by three_____________________?
Atoms of U-238 and U-235 differ in structure by three_____________________?A. Electrons and three protons
B. Protons
C. Neutrons
D. ElectronsThe ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?
The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?A. 1
B. 0.5
C. 2
D. 4Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher _____________________?
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher _____________________?A. Melting point, hence can be subjected to higher temperature
B. Density; hence core volume for a given power output would be smaller
C. Resistance to effects of irradiation
D. All A., B. and C.Enriched uranium means that, it contains___________________?
Enriched uranium means that, it contains___________________?A. More than 0.71% of U-235
B. Only fertile material
C. Only fissile material
D. No impuritiesThe radioisotope used to study the thyroid gland is__________________?
The radioisotope used to study the thyroid gland is__________________?A. Iodine
B. Cobalt
C. Iron
D. Carbon