The ionization enthalpy of hydrogen atom is $1.312 \times 10^6\;J\;mol^{-1}$. The energy required to exit the electron in the atom from $n=1\;to \;n=2$ is

Question

$\begin{array}{1 1}7.56 \times 10^5 \;J\;mol^{-1} \\ 9.84 \times 10^5 \;J\;mol^{-1} \\ 8.51 \times 10^5 \;J\;mol^{-1} \\ 6.56 \times 10^5 \;J\;mol^{-1} \end{array}$