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In a nuclear reactor, heavy water is use...

In a nuclear reactor, heavy water is used

A

provide high speed to neutrouns

B

reduce the speed to neutrons

C

capture neutrons produced by nuclear fission

D

transfer the heat from the nuclear reactor

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The correct Answer is:
b,c
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In nuclear reactors heavy water is used as a

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Some statements about heavy water are given below : (i) Heavy water is used as a moderator in nuclear reactors (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than ordinary water Which of the above statments are correct ?

Consider the following statements : 1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction. 2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled. 3. In a nuclear reactor, all operating reactors are 'critical', while there is no question of 'criticality' in case of a nuclear bomb. 4. Nuclear reactors do not use moderators, while nuclear bombs use them. Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is/are correct?

Nuclear reactors are based on

Assertion : Heavy water is used as moderator in nuclear reactor. Reason : Water cool down the fast neutron.

OP TANDON-RADIOACTIVITY AND NUCLEAR TRANSFORMATION -OBJ - A
  1. Which of the following notation shows the product incorrectly?

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  2. Which is ture about decay constant (lambda)?

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  3. Which of the following is not correct?

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  4. Correct order of radioactivity is:

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  5. At radioactive equilibrium, the ratio between two atoms of radioactive...

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  6. In the sequence of the following nuclear reaction, X(98)^(238) overs...

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  7. Co^(60) has half-life of 5.3 years. Find the number of half-lives for...

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  8. Which of the following "is"//"are" correct? a)alpha-rays are more pene...

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  9. Select the wrong statement:

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  10. In a nuclear reactor, heavy water is used

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  11. The correct starting material and product of different disintegration ...

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  12. Which of the following is/are not ture?

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  13. Which of the following is/are correct?

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  14. Consider the following nuclear reactions: (1) .(7)^(14)N + .(2)^(4)H...

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  15. Which of the following statements is/are correct

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  16. Which of the following statements is/are correct

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  17. A nuclide has mass number (A) and atomic number (Z). During a radioact...

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  18. In the decay process: A overset(-alpha)(to) B overset(-alpHa)(to) C ...

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  19. The nuclide X undergoes alpha-decay and other nuclide Y, beta^(-) deca...

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  20. Fill in the blank space with a suitable answer selected from the list ...

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