Question

For which of the following processes Δeg H is positive ?
A 0- + e- — O²-
B. CI + e- — CI-
C. S + e- — S-
D. F + e- — F-​

Answer 1

Answer:

Explanation:

Option A will be correct option, as O- is already present with extra electron, so if we try to introduce another electron to this then electron -electron repulsion will occur that's why we need to provide energy to introduce another electron. As we need to provide energy that means Change in enthalpy (∆H) wil be postive that means this reaction will be endothermic.