The first ( $\Delta_{i} H_{1}$ ) and the second ( $\Delta_{i} H_{2}$ ) ionisation enthalpies in $\ma

Question

The first ( $\Delta_{i} H_{1}$ ) and the second ( $\Delta_{i} H_{2}$ ) ionisation enthalpies in $\mathrm{kJ} \mathrm{mol}^{-1}$ and the electron gain enthalpy $\left(\Delta_{e g} Hight)$ in $\mathrm{kJ} \mathrm{mol}^{-1}$ of a few elements are given as : \Which one of the given elements is least reactive?\

Professor PC Thomas Classes · Answer

(c): The element $E$ having very high I.E. and positive electron gain enthalpy is the least reactive.\