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The alpha- rays have more penetrating po...

The `alpha-` rays have more penetrating power than `gamma-` rays.

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The least penetrating power ray is

Assertion (A): beta- particles have greater penetrating power than alpha- rays but less than gamma- rays. Reason (R) : beta- particles are lighter than alpha- particles but heavier than gamma.

Assertion (A) : beta -particles have greater penetrating power than alpha -rays but less than gamma -rays Reason (R ) : beta -particles are lighter than alpha -rays but heavier than gamma -rays

Assertion (A): gamma- rays have very high penetrating power. Reason (R) : gamma- rays are high - energy electromagnetic radiations.

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CENGAGE CHEMISTRY-NUCLEAR CHEMISTRY-Exercise True/False
  1. The alpha- rays have more penetrating power than gamma- rays.

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  2. Radioisotopes of elements have same atomic number.

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  3. Smaller the value of half- life period, greater is the number of atoms...

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  4. Radon, actinon, and thoron are isobars.

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  5. The last member of 4n+1 series is an isotope of lead.

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  6. Gamma rays produce maximum ionization in gases.

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  7. The radioactive decay follows zero- order kinetics.

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  8. Pu^(239) is an artificial fissile material.

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  9. Control rods of calcium or boron are inserted into the nuclear reactor...

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  10. I^(131) is unsed to study the activity of thyroid gland.

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  11. Alpha particles are positively charged.

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  12. Tritium is beta- radioactive in nature.

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  13. The atomic reactor when used to generate electricity is termed breeder...

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  14. The nuclear activity of a neutral atom and its ion is always the same.

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  15. A positron is as heavy as a proton.

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  16. The percentage efficiency of nuclear fissiion is higher than nuclear f...

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  17. The ratio of C^(14)//C^(12) in dead tissue is less than that in fresh ...

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  18. The SI unit of radioactivity is curie.

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  19. All radioactive elements which emit beta- rays have the same half - l...

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  20. The emission of an alpha- particle reduces the mass of nuclei by 4 uni...

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