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The binding energy of e^(-) in ground st...

The binding energy of `e^(-)` in ground state of hydrogen atom is 13.6 eV . The energies required to eject out an electron from three lowest states of `He^(+)` atom will be (in eV):

A

13.6 , 10.2 , 3.4

B

13.6, 3.4 , 1.5

C

13.6 , 27.2 , 40.8

D

54.4 , 13.6 , 6

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The correct Answer is:
D
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