Advertisements
Advertisements
प्रश्न
Which of the following is used as a moderator in the reactor of a nuclear power station?
(a) liquid sodium
(b) boron
(c) graphite
(d) carbon dioxide
उत्तर
graphite
Graphite acts a moderator in the reactor by slowing down fast-moving neutrons in it.
APPEARS IN
संबंधित प्रश्न
Write Einstein's mass-energy equation. Give the meaning of each symbol which occurs in it.
What is a nuclear reactor? What is the fuel used in a nuclear reactor?
Which one of the following statements about alpha and beta particles is
correct?
Name the following nuclear reaction:
\[\ce {^235_92U +^1_0n-> ^90_38Sr + ^143_54Xe + 3^1_0n + γ}\]
State the kind of nuclear reaction taking place in a nucleus during the emission of a β-particle.
An imaginary radioactive element `"_92X^235` decays to form X1; X2; X3; X4; X5 and X6 nuclides, by ejecting two β-particles, followed by α-particles and again two β-particles, followed by α-particle. Represent the various nuclear changes in the form of an equation. State the mass number and atomic number of X6. List the isotopes and isobars in the above nuclear equation.
What changes will take place in the mass number and atomic number of the nucleus Y if it emits gamma radiations?
What changes occur in the nucleus of a radioactive element when it emits an alpha particle? Show by an example?
Write the demerits of a nuclear energy plant.
Copy and complete the nuclear reaction by filling in the blanks.
\[\ce{_92U^235 + _0n^1 -> _56Ba^{\underline{\phantom{....}}} + \underline{\phantom{..}}Kr^92 + 3 _0n^1}\]
