If 13.6 eV energy is required to ionize the hydrogen atom, then the energy required to remove an electron from n = 2 is

- 0 eV
- 3.4 eV
- 6.8 eV
- 10.2 eV

**Answer**

Energy required to remove electron from n^{th} orbit is

E = - 13.6/n^{2}

**The correct option is B.**