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The number of spectral lines that are po...

The number of spectral lines that are possible when electrons in `7^("th")` shell in different hydrogen atoms return to the `2^(nd)` shell is 

A

12

B

15

C

14

D

10

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ATOMIC STRUCTURE-OBJECTIVE EXERCISE - 2
  1. What electronic transition in Li^(2+) produces the radiation of the sa...

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  2. The ratio of the wave lengths of the first line in the Lyman series of...

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  3. The number of spectral lines that are possible when electrons in 7^("t...

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  4. In a certain electronic transition from the quantum level, 'n' to the ...

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  5. The minimum and maximum values of wave length in the Lyman series of a...

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  6. Which of the following transitions of an electron in hydrogen atom emi...

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  7. In a hydrogen atom, the electron is at a distance of 4.76Å from the nu...

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  8. Which of the following statements regarding spectral series is correct...

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  9. In a series in the line spectrum of hydrogen the wavelength of radiati...

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  10. The frequency of the spectral line obtained when the electron in n = 3...

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  11. When a greater number of electrons from excited hydrogen atoms reach t...

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  12. The first spectral line in the Pfund series of Hydrogen spectrum is gi...

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  13. A certain transition in H spectrum from an excited state to ground sta...

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  14. The radii of two of the first four Bohr orbits of the hydrogen atom ar...

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  15. Which one of the following statements is not correct?

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  16. The ratio of radii of first orbits of H, He^(+) and Li^(2+) is

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  17. The ratio of the radii of the first three orbits in an atom of hydroge...

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  18. The radius of hydrogen atom in the ground state is 0.53 Å, the radius ...

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  19. In hydrogen atom the kinetic energy of electron is 3.4 eV. The distanc...

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  20. The radius of first Bohr's orbit for hydrogen is 0.53Å. The radius of ...

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