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The question given below consist of an a...

The question given below consist of an assertion (A) and a reason ( R). Use the following key to choose the appropriate answer to these questions from the codes (a), (b), ( c) and (d) given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is NOT the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.
Assertion: Nucleus of the atom does not contain electrons, yet it emits `beta`-particles in the form of electrons.
Reason: In the nucleus, protons and neutrons exchange mesons frequently.

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MODERN PUBLICATION-Radioactivity-EXERCISE
  1. The question given below consist of an assertion (A) and a reason ( R)...

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  2. What is meant by radioactive substance?

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  3. What is radioactivity ? State laws of radioactive decay and deduce an ...

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  4. State the law of radioactive decay. Show that radioactive decay is exp...

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  5. State the law of radioactive decay, If N0 is the number of radioactive...

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  6. Show that decay rate R of a sample of a radio-nuclide is related to th...

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  7. State the law of radioactive decay and hence derive the relation N=N0e...

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  8. State the law of radioactive decay and hence derive the relation N=N0e...

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  9. Sketch a graph to illustrate radioactive decay.

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  10. What is meant by half life of a radioactive substance? Derive expressi...

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  11. What is radioactivity ? State laws of radioactive decay and deduce an ...

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  12. An isotope (92)U^(238) decays successively to form (90)Th^(234),(91)P...

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  13. Define decay constant of a radioactive sample. Which of the following ...

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  14. Define decay constant of a radioactive sample. Which of the following ...

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  15. Define decay constant of a radioactive sample. Which of the following ...

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  16. Define decay constant of a radioactive sample. Which of the following ...

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  17. The rate constant and half life of a first order reaction are related...

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  18. State the law of radioactive decay. Show that radioactive decay is exp...

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  19. State the law of radioactive decay. Show that radioactive decay is exp...

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  20. Define half life of a radioactive substance.

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  21. What is radioactivity ? State laws of radioactive decay and deduce an ...

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