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The critical mass of a fissionable urani...

The critical mass of a fissionable uranium `-235` can be reduced by

A

Heating it

B

Cooling it

C

Adding impurities to it

D

Surrounding it with a shield that will reflect neutrons

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The correct Answer is:
D
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PHYSICS GALAXY - ASHISH ARORA-NUCLEAR PHYSICS AND RADIOACTIVITY-Concptual MCQs
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  2. The chemical behaviour of a atom depends upon:

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  3. The critical mass of a fissionable uranium -235 can be reduced by

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  4. Cadmium and Broron rods are used in a nuclear reactor to

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  5. A beta- particle is emitted by a radioactive nucleus at the time of co...

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  6. Why does the fussion occur at high temeprature?

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  7. Mass defect of an atom refers to

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  8. If M is the mass of a nucleus and A its atomic mass, then the packing ...

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  9. The fusion of hydrogen into helium is more likely to take place:

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  10. The number of neutrons that are released on an average during the fiss...

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  11. A beam of fast moving alpha particles were directed towards a thin fil...

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  12. From the following equations pick out the possible nuclear fusion reac...

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  13. Radio carbon dating is done by estimating in the speciment:

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  14. Which of the following cannot be emitted by radioactive substances dur...

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  15. The electron emitted in beta radiation originates from

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  16. In the following reaction the value of 'X' is. .7 N^14 + .2 He^4 rar...

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  17. What is the respective number of alpha and beta particles emitted in t...

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  18. The radioactive nucleus of an element X decays to a stable nucleus of ...

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  19. The radioactive decay of uranium into thorium is represented by the eq...

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  20. At a result of radioactive decay a .(92)^(238)U nucleus is changed to ...

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