The correct order of electron gain enthalpy is

Choose the correct order of $\Delta H_{eg}$ ?
$(\Delta H_{eg} = \text{electron gain enthalpy})$

Which halogen has the highest value of negative electron gain enthalpy?

In which of the following processes is the least energy required?

In which of the following processes is energy absorbed?

The electron affinity values (in $kJ \ mol^{-1}$) for halogens $X, Y,$ and $Z$ are $-349, -333,$ and $-325$ respectively. Therefore,$X, Y,$ and $Z$ are respectively which of the following?