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If each hydrogen atom is excited by give...

If each hydrogen atom is excited by giveng ` 8. 4 eV` of energy , then the number fo spectral lines emeitted si equal to :

A

` 0`

B

` 2`

C

` 3`

D

`4`

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Verified by Experts

The correct Answer is:
A
For excitation fo electron from ground state the minimum energy needed is ` 10. 2 eV,`
` E_2 - E_1 =- 3.4 - ( - 13 . 6) `.
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P BAHADUR-ATOMIC STRUCTURE-Exercise 3A
  1. Isoelectronic structures among the following structures are : (I) CH...

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  2. Possible muber of orientations fo a subshell is :

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  3. If each hydrogen atom is excited by giveng 8. 4 eV of energy , then t...

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  4. The magneit moment fo electron in an atom ( excluding orbitial magnetc...

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  5. Atom conssit of electrons , protons and neutrons . If the mass attribu...

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  6. As an electron is brought form an infinite distance close to the nucle...

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  7. Which orbital is nearest to the nucleus ?

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  8. Which ion has the maximum magnetic moment ?

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  9. The quantum number that does not describe the distance and the angular...

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  10. In hydrogen atom which enrgy level order si bnot correct ?

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  11. If the atomic weight oc C and SI are 12 and 28 respectively , then wha...

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  12. Which will be the most stble among Cu^(+) , Fe^(+) Fe^(2+) and Fe^(3...

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  13. Which jave the same number of s-electrons as the d-dlectrons in Fe^(2...

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  14. Which orbital has two angular nodal planes ?

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  15. psi^2 ,( psi) the wave function resperesents the probability of findi...

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  16. " Positronium " is the name given to an aotm like combination formed b...

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  17. The configureation is 1s^(2) 2s^(2) 2p^(5) , 3s^(1) shows :

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  18. The orbital cylindrically symmetrical abut x-axis is :

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  19. Which orbital is represented by the complete wave funcion psi (420) ?

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  20. The number fo bodal planes is greatest for the orbital :

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