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Heavy water is used as moderator in a nu...

Heavy water is used as moderator in a nuclear reactor. The function of the moderator is

A

To control the energy released in the reactor

B

To slow down the neutrons to thermal energies

C

To cool the reactor faster

D

To absorb neutrons and stop chain reaction

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The correct Answer is:
B
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An isotope of hydrogen reacts with oxygen to give compound (A), which is used as a moderator in nuclear reactor. Like hydrogen, this isotope also undergoes addition reaction. It reacts with ethylene to give compound B, which is a saturated hydrocarbon. Identify the element A and B. A is radioactive.

AAKASH SERIES-NUCLEI-Exercise-I
  1. At a specific instant, the emission of radio active compound is deflec...

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  2. Cadmium and Boron rods are used in a nuclear reactor to

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  3. Heavy water is used as moderator in a nuclear reactor. The function of...

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  4. In fission of U-235, the percentage of mass converted into energy is a...

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  5. The reactor in which the number of fissionable nuclides produced are m...

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  6. A nucleus with z= 92 units emits the following in a sequence. alpha,...

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  7. To sustain the chain reaction, the mass of the material should be

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  8. Nuclear fission can be explained by

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  9. The operation of a nuciear reactor is said to be critical, if the mult...

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  10. The main source of sun.s energy is

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  11. Fusion reaction take place at high temperature because

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  12. Nuclear fusion is possible

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  13. In sun, the important source of energy is,

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  14. In carbon-nitrogen nuclear fusion cycle, protons are fused to form a h...

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  15. When two deuterium nuclei fuse together to form a tritium nuclei, we g...

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  16. Particles and their anti-particles have,

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  17. The particles that possesses half integral spin is

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  18. The half life period of the radioactive is .15P^30 is

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  19. In gamma ray emission from a nucleus

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  20. .(+1)e^@ + .(-1)e^@ to 2gamma The above equation satisfies the law of ...

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