Question 61 : Nuclides having the same atomic number are termed as?
1. Isobars
2. Isotones
3. Isotopes
4. Isomers
View Answer   Discuss with Members

Question 62 : Atoms with same number of neutrons, but different number of nucleons are called
1. Isobars
2. Isotones
3. Isotopes
4. Isoters
View Answer   Discuss with Members

Question 63 : Nucleus of tritium has how many neutrons?
1. 1
2. 2
3. 3
4. 4
View Answer   Discuss with Members

Question 64 : If 4 gm of a radioisotope has a half-life period of 10 days, the half-life of 2 gm of the same istotope will be __________ days.
1. 10
2. 5
3. 20
4. 30
View Answer   Discuss with Members

Question 65 : The time required for half of the __________ of a radioactive isotope to decay is called its half-life.
1. neutron
2. electron
3. proton
4. nuclei
View Answer   Discuss with Members

Question 66 : A radioactive isotope undergoes decay with respect to time following __________ law
1. logarithmic
2. exponential
3. inverse square
4. linear
View Answer   Discuss with Members

Question 67 : Fast breeder reactors do not
1. use molten sodium as coolant
2. use fast neutrons for fission
3. use Th-232 as fissile fuel
4. convert fertile material to fissile material
View Answer   Discuss with Members

Question 68 : 'Critical mass' is the minimum mass of nuclear fissile material required for the
1. sustainment of chain reaction
2. economic power generation
3. power generation on commercial scale
4. none of the mentioned
View Answer   Discuss with Members

Question 69 : The main ore of thorium is?
1. Magnetite
2. Monazite Sand
3. Pitchblende
4. None of the mentioned
View Answer   Discuss with Members

Question 70 : The decay product of tritium is?
1. Hydrogen
2. Deuterium
3. Lithium
4. Helium
View Answer   Discuss with Members