Chemistry Question from JEE Main 2026 · 22 January, Shift 1

A $p$-block element $E$ and hydrogen form a binary cation $\left(EH_x\right)^+$, while $EH_3$ on treatment with $K_2HgI_4$ in alkaline medium gives a precipitate of basic mercury(II) amido-iodide. Given below are first ionisation enthalpy values $\left(\text{kJ mol}^{-1}\right)$ for the first elements each from groups $13$, $14$, $15$ and $16$. Identify the correct first ionisation enthalpy value for element $E$.