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Every series of hydrogen spectrum has an...

Every series of hydrogen spectrum has an upper and lower limit in wavelength. The spectral series which has an upper limit of wavelength equal to 18752 Å is

A

Balmer series

B

Lyman series

C

Paschen series

D

Pfund series

Text Solution

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The correct Answer is:
C
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SURA PUBLICATION-NUCLEAR PHYSICS-ADDITIONAL QUESTIONS & ANSWER (CHOOSE THE CORRECT ANSWER)
  1. The first nuclear reavtor was built at

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  2. In order to supply neutrons for research purpose , we use reactors.

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  3. For production of radio-isotopes , we use reactions.

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  4. A good slows down neutrons by elastic collisions and it does not remo...

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  5. Commonly used moderators are and .

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  6. Graphite is used as a in nuclear reactors.

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  7. are used to control the chain reaction.

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  8. The moderator used in nuclear reacton is .

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  9. Which of the following is not a moderactor?

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  10. The coolant used in fast breeder reactor is .

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  11. In nulcear reactors, convert fast neutrons into slow neutrons.

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  12. In a nuclear reactor, cadmium rods are used to .

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  13. Mass of the fissile material at the critical size is called.

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  14. prevents the leakage of neutrons be reflecting them back.

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  15. BARC(Bhabha Atomic Research Centre) is situated at .

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  16. Reactor Kamini is situated at

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  17. Every series of hydrogen spectrum has an upper and lower limit in wave...

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  18. An electron has a mass of 9.1×10^-31 kg . It revolves round the nucleu...

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  19. Nuclear fusion is possible only at an extremely high temperature of th...

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  20. The mass of the product nucleus is always the sum of masses of the lig...

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