If each hydrogen atom in the ground state, 1.0 inole of H atoms are excited by absrobing photons of energy 8.4 eV, 12.09 eV and 15.0 eV of energy, then the number of spectral lines emitted is equal to

If each hydrogen atom in the ground state, 1.0 inole of H atoms are ex

1.	If each hydrogen atom in the ground state, 1.0 inole of H atoms are excited by absrobing photons of energy 8.4 eV, 12.09 eV and 15.0 eV of energy, then the number of spectral lines emitted is equal to
Answer» SOLUTION :By absorbing 8.4 ev not excited By absorbing 15eV , it is ionised . So, only POSSIBLE is 12.09eV. `Delta E =-13.6 + 12.09 =-1.5 eV` i.e., n=3