AP EAPCET 04-Jul-2022 Shift 2 Paper

(a) Electron gain enthalpy increases across a period on moving from left to right. So, F has maximum electron gain enthalpy whereas N has minimum electron gain enthalpy.
On moving down the group, electron gain enthalpy decreases but from 2 nd period to 3 rd period, it increases because of high electronic repulsions in 2nd period. Hence, the correct order is
F>S>O>N