Ground state energy of H-atom is -13.6 e...

Ground state energy of H-atom is -13.6 eV. The energy needed to ionise H-atom from its second excited state is

A

`1.51 eV`

B

`3.4 eV`

C

`13.6 eV`

D

`12.1 eV`

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The correct Answer is:

A

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