Q. Ordinary water is not used as a moderator because, it

View solution

Q. The decay product of tritium (a beta emitter) is

View solution

Q. Heat is generated in a nuclear reactor (thermal) by

View solution

Q. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.

View solution

Q. Which of the following may not need a moderator ?

View solution

Q. The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.

View solution

Q. Which of the following is not, a fertile material ?

View solution

Q. Molten sodium (as a coolant in fast breeder reactor)

View solution

Q. Final product of uranium extraction plant at Jadugoda (Bihar) is

View solution

Q. Which one is the radioactive isotope of hydrogen ?

View solution

Q. A homogeneous reactor is the one, in which the

View solution

Q. Hydrogen has __________ isotopes.

View solution

Q. MeV is the unit of

View solution

Q. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.

View solution

Q. Energy equivlant to one atomic mass unit (amu) is __________ MeV.

View solution

Q. "Critical mass" is the minimum mass of nuclear fissile material required for the

View solution

Q. Which of the following may be used to measure the rate of nuclear disintegration?

View solution

Q. The decrease in the atomic number is not observed in case of

View solution

Q. The mass number of an element is not changed, when it emits __________ radiations.

View solution

Q. Which of the following is not a naturally occurring nuclear fuel ?

View solution