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If by mistake radioactive substance gets...

If by mistake radioactive substance gets into human body, then from the point of view of radiation damage, the most harmful will be one that emits.

A

`gamma`-rays

B

neutrons

C

`beta`-rays

D

`alpha`-rays

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The correct Answer is:
a
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OP TANDON-RADIOACTIVITY AND NUCLEAR TRANSFORMATION -OBJ - A
  1. A device used for the measurement of radioactivity is

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  2. Which of the following does not contain material particles?

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  3. If by mistake radioactive substance gets into human body, then from th...

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  4. Emission of beta-particle by an atom of an element results in the form...

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  5. The particles not emitted by radioactive susbstace are:

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  6. Successive emission of an alpha-particle and two beta-particles by an ...

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  7. The isotope .(92)^(235)U decays in a number of steps to an isotope of ...

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  8. The number of alpha and beta-particles emitted in the nuclear reaction...

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  9. .(84)^(210)Po rarr (82)^(206) Pb + .(2)^(4)He in this reaciton predict...

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  10. When .(88)^(226)Ra emits an alpha-particle, the new element formed bel...

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  11. The radius of nucleus is:

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  12. The end product of 4n series is a).(82)Pb^(208) b).(82)Pb^(207) c).(82...

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  13. 4n + 2 series is known as:

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  14. A radioactive element A on disintegration gives two elements B and C. ...

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  15. .^(234)U has 92 protons and 234 nucleons total in tis nucleus. It deca...

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  16. Starting from radium, the radioactive disintegration process terminat...

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  17. The only, most stable nucleus formed by bombarding either .(13)^(27)Al...

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  18. The number of alpha-particles emitted per second by 1g fo .^(226)Ra is...

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  19. The decay constant of Ra^(226) is 1.37xx10^(-11)s^(-1). A sample of Ra...

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  20. A sample of .(19)^(40)K contains invariably .(18)^(40)Ar. This is beca...

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