AP EAPCET 3 Sep 2021 Shift 2 Paper

Question : 125 of 160

Marks: +1, -0

The formation of an oxide ion from Oxygen atom takes place as shown below. This two-step process is unfavourable, even though 02− is iso-electronic with Neon, due to the fact that _____0(g)+e−⟶0(g)−;∆Hf0=−141kJ⋅mol−1
0(g)−+e−⟶0(g)2−;∆Hf0=+780kJ⋅mol−1