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Atoms Test - 53...

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  • Question 1
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    The quantum number corresponding to orbit of diameter 0.0001 mm in hydrogen atom will be nearly (Given that the radius of orbit with n = 1 is 0.51×10100.51\times 10^{-10}):

  • Question 2
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    How many times does the electron go round the first Bohr orbit in a second?

  • Question 3
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    The radius of the first Bohr orbit of a hydrogen atom is 0.53×1010m 0.53\times 10^{-10}m.When an electron collides with this atom which is in its normal state, the radius of the electron orbit in the atom change to 2.12×1010m2.12 \times 10^{10}m.The value of the principal quantum number nn of the state to which it is excited is:

  • Question 4
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    If energy required to remove one of the two electron from  He \text { He } atom is 29.5eV,29.5 eV, then what is the value of energy required to convert a helium atom into α\alpha -particle?

  • Question 5
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    Photoelectric effect was successfully explained by 

  • Question 6
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    The ratio of the speed of the electron in the first Bohr orbit of hydrogen and the speed of light is equal to then (where e, h and c have their usual meanings)

  • Question 7
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    The ratio of the velocity of an electron in the first  Bohr's orbit of the hydrogen atom and the velocity of light is:

  • Question 8
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    If an electron in a hydrogen atom has moved from n=1n = 1  to  n=10n = 10 orbit, the potential energy of the system has:

  • Question 9
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    The ratio of the orbit of the 1st1st three radii in an atom of hydrogen is 

  • Question 10
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    Ratio of series limit of Brackett and Pfund series of hydrogen ato spectrum is

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