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Atoms, Nuclei &...

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  • Question 1
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    Fluorescent lamps are more efficient than incandescent lamps in converting electrical energy to visible light because

     

  • Question 2
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    In which of the models An atom has a nearly continuous mass distribution?

     

  • Question 3
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    Find the longest wavelength present in the Balmer series of hydrogen, corresponding to the H- line.

     

  • Question 4
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    According to Bohr model radiation takes place when

     

  • Question 5
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    The model that best explains the results of Geiger-Marsden experiment is

     

  • Question 6
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    To produce an emission spectrum of hydrogen

     

  • Question 7
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    According to Bohr model allowed values of angular momentum are

     

  • Question 8
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    Which of these statements about Bohr model hypothesis is correct?

     

  • Question 9
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    In a Geiger -Marsden experiment, what is the distance of closest approach d to the nucleus of a 7.7 MeV α−particle before it comes momentarily to rest and reverses its direction?

     

  • Question 10
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    Absorption line spectrum is obtained

     

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