If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li++ is

Q: If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li++ is

(a) 122.4 eV

(b) 30.6 eV

(c) 13.6 eV

(d) 3.4 eV

Ans:(b)