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Number of possible sepectral lines whic...

Number of possible sepectral lines which ,may br emitted in bracket series in H atom , if electron present in `9^(th)` excited level returns to ground level ,are

A

21

B

6

C

45

D

5

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The correct Answer is:
B
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BANSAL-ATOMIC STRUCTURE-Exercise.1
  1. Three energy levels P,Q,R of a certain atom are such that E(P)ltE(Q)lt...

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  2. The value of (n(2)+n(1)) and (n(2)^(2)-n(1)^(2)) for He^(+) ion in at...

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  3. Number of possible sepectral lines which ,may br emitted in bracket s...

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  4. The longest wavelength of He^(+) in paschen series is "m", then shor...

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  5. When electron make transition to gound state, the largest wavelenght (...

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  6. In sample of hydrogen atoms , electron jump from 10^(th) excited state...

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  7. An electron in a hydrogen atom in its ground state absorbs energy equa...

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  8. An electron, a proton and an alpha particle have kinetic energy of 16...

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  9. For particles having same kinetic energy , the de Brogle wavelenght ...

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  10. In a hydrogen atom , in transition of electron a photon of energy 2.55...

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  11. An unknown particle having double charge as proton itself moves with w...

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  12. If uncertainty in position and momentum are equal then uncertainty in ...

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  13. If uncertainty in velocity is6.62xx10^(-2)m//sec . For a particle of m...

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  14. What is uncerainty in location of photod of wavelenght 5000Å if wavel...

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  15. The number of nodal planes in a p(x) orbital is :

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  16. The quatum numbers +(1)/(2) and -(1)/(2) for the electron spin represe...

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  17. Which electronic level would allow the hydrogen atom to absorbs a phot...

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  18. The orbital angular momentum of an electron in 2s-orbital is

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  19. Which quantum number is not related with Schrodinger equation :-

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  20. The number of electrons present in Co^(2+) having azimuthal quantum ...

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