Question
The first, second and third Ionisation energies $(E_1 , E_2$ and $E_3)$ for an element  are $7\, eV, 12.5\,eV$ nnd $42.5\, eV$ respectively. The most stable oxidation state of the  element will be

Answer

d

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$\begin{matrix}
   \begin{matrix}
   \,\,\,\,\,C{{H}_{3}}  \\
   |  \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C-C{{H}_{2}}C{{H}_{2}}OH  \\
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