The first ionization enthalpy of $Al$ is lower than that of $Mg$ because .......................

Find the incorrect comparison of second ionisation energy.

Arrange $S, P, As$ in order of increasing ionisation energy.

The first ionization enthalpy of the following elements are in the order:

Of the following isoelectronic ions,the one which has the lowest ionisation potential is

First and second ionization enthalpies of lithium are $520 \text{ kJ mol}^{-1}$ and $7297 \text{ kJ mol}^{-1}$ respectively. Energy required to convert $3.5 \text{ mg}$ lithium $(g)$ into $Li^{2+}(g)$ [$Li(g) \rightarrow Li^{2+}(g)$] is . . . . . . $\text{kJ}$. (nearest integer) [Molar mass of $Li = 7 \text{ g mol}^{-1}$]