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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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MOTION-ATOMIC STRUCTURE -EXERCISE-2 (LEVEL-I)
  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. An electron, a proton and an alpha particle have kinetic energy of 16...

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  6. The approximate wavelength associated with a gold-ball weighting 200 g...

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  7. What is uncertainity in location of a photon of wavelength 5000 Å if w...

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  8. Assuming Heisenberg Uncertainity Principle to be true what could be th...

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  9. An electron is moving with the velocity equal to 10% of the velocity o...

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  10. The following graph between Psi^(2) probability density and distance f...

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  11. Which of the following is correct radial probability distribution curv...

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  12. Which of the following graphs correspond to one node ?

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  13. Suggest the angular and spherical nodes in a.4p b.3p c. 3s

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  14. Increasing order of magnetic monent among the following species is ...

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  15. Which electronic level would allow the hydrogen atom to absorb a phot...

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  16. The orbital angular momentum of an electron in 2s orbital is ………

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

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  18. In the absence of external magnetic field, d-orbital is

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  19. In which of the following pairs is the probability of finding the elec...

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  20. The maximum probability of finding electron in the d(xy) orbital is -

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