Nuclear Physics One Mark Questions

10th Standard EM

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Science

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 1 = 5
  1. Gamma radiations are dangerous because

    (a)

    it affects eyes & bones

    (b)

    it affects tissues

    (c)

    it produces genetic disorder

    (d)

    it produces enormous amount of heat

  2. _____________ aprons are used to protect us from gamma radiations

    (a)

    Lead oxide

    (b)

    Iron

    (c)

    Lead

    (d)

    Aluminium

  3. Proton - Proton chain reaction is an example of__________

    (a)

    Nuclear fission

    (b)

    \(\alpha\) decay

    (c)

    Nuclear fusion

    (d)

    \(\beta\) - decay

  4. A chain reaction is continuous due to

    (a)

    large mass defect

    (b)

    large energy

    (c)

    production of more neutrons in fission

    (d)

    None of these

  5. Nucleons are made of ________.

    (a)

    atoms

    (b)

    electrons and protons

    (c)

    electrons and neutrons

    (d)

    protons and neutrons

  6. 5 x 1 = 5
  7. Nuclear fusion is possible only at an extremely high temperature of the order of ____ K.

    ()

    107 to 109 K

  8. The radio isotope of ________ helps to increase the productivity of crops.

    ()

    Phosphorous

  9. If the radiation exposure is 100 R, it may cause ______________.

    ()

    Iukemia

  10. Indian Atomic Energy Commission is known as ________.

    ()

    Baba Atomic Research Centre (BARC)

  11. ______ is a device used to detect the level of exposure to ionizing radiation

    ()

    Dosimeter

  12. 5 x 1 = 5
  13. Uncontrolled fission reaction

  14. (1)

    Breeder reactor

  15. Fertile material

  16. (2)

    no change in mass number

  17. Beta decay

  18. (3)

    change in mass number & atomic number

  19. Gamma decay

  20. (4)

    no change in mass number & atomic number

  21. Alpha decay

  22. (5)

    Atom bomb

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