An energy of 24.6 eV is required to remove one of the electrons from a neutral helium atom. The energy (in eV) required to remove both the electrons from a neutral helium atom is

After the removal of first electron remaining atom will be hydrogen like atom.So energy required to remove second electron from the atom E=13.6Z2n2=13.6×2212=54.4eV∴ Total energy required =24.6+54.4=79eV