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10th Standard Science - Nuclear Physics Model Question Paper Oct-04 , 2019

Nuclear Physics 

10th Standard Science - Nuclear Physics Model Question Paper

Nuclear Physics Model Question Paper

10th Standard

    Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 50
    5 x 1 = 5

  1. Unit of radioactivity is _____________

    (a)

    roentgen

    (b)

    curie

    (c)

    becquerel

    (d)

    all the above

  2. ____________ isotope is used for the treatment of cancer.

    (a)

    Radio Iodine

    (b)

    Radio Cobalt

    (c)

    Radio Carbon

    (d)

    Radio Nickel

  3. Proton - Proton chain reaction is an example of__________

    (a)

    Nuclear fission

    (b)

    \(\alpha\) - decay

    (c)

    Nuclear fusion

    (d)

    \(\beta\) - decay

  4. Kamini reactor is located at __________

    (a)

    Kalpakkam

    (b)

    Koodankulam

    (c)

    Mumbai

    (d)

    Rajasthan

  5. The explosion of the atomic bomb takes place due to

    (a)

    Nuclear fission

    (b)

    Nuclear fusion

    (c)

    Scattering

    (d)

    Heating

    6. 5 x 1 = 5

  6. One roentgen is equal to ____________ disintegrations per second

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    3.7 x 1010

  7. _________is used to measure exposure rate of radiation in humans.

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    Dosimetre

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

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    Leukemia

  9. Number of _______ reactors operating in India are _________.

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    nuclear, 22

  10. The phenomenon or radioactivity is ________.

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    spontaneous emission

    11. 2 x 2 = 4

  11. Assertion: Control rods are known as 'neutron seeking rods'
    Reason: Control rods are used to perform sustained nuclear fission reaction.
    (a) If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
    (b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
    (c) Assertion is true, but the reason is false.
    (d) Assertion is false, but the reason is true.

  12. Assertion: Among alpha, beta and gamma rays, a - particle has maximum penetrating power.
    Reason: The a - particle is heavier than β & ૪ rays.
    Codes:
    (a) Both assertion and reason are true and reason is correct explanation of assertion 
    (b) Both assertion and reason are true but reason is not the correct explanation of assertion 
    (c) Assertion is true but reason is false 
    (d) Assertion is false but reason is true.

    13. 7 x 2 = 14

  13. Who discovered natural radioactivity?

  14. Write any two elements which are used for inducing radioactivity?

  15. What is the amount of radiation that may cause death of a person when exposed to it?

  16. Give the SI unit of radioactivity

  17. Which material protects us from radiation?

  18. Define Curie.

  19. Distinguish between fissionable & fertile material.

    20. 2 x 4 = 8

  20. Give the function of control rods in a nuclear reactor.

  21. What is stellar energy?

    22. 1 x 7 = 7

  22. Compare the properties of alpha, beta and gamma radiations.

    23. 1 x 7 = 7

  23. Identify A, B, C, and D from the following nuclear reactions.
    (i) 13AI27 + A  \(\longrightarrow \) 15P30 + B
    (ii) 12Mg24 + B  \(\longrightarrow \) 11Na24 + C
    (iii) 92U238 + B \(\longrightarrow \) 93Np239 + D

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