Select the endothermic step(s):

Options

A. `S^(-)(g)+e^(-) rarr S^(2-)(g)`
B. `Ne(g)+e^(-) rarr Ne^(-) (g)`
C. `N(g) +e^(-) rarr N^(-)(g)`
D. `AI^(2+)(g) rarr AI^(3+) (g)+e^(-)`

Answer

A, B, C, D

Explanation

`{:((A)S^(-)(g)rarrS^(2-)(g),,DeltaH_(eg)=(+)ve,"because of electrostatic repulsion"),((B)Ne(g)+e^(-)(g)rarrNe^(-)(g),, DeltaH_(eg)=(+)ve, "because of stable completely filled electron configuration"),((C )N(g)rarrN^(-)(g),,DeltaH_(eg)=(+)ve,"because of stable half filled electron configuration"),((D)AI^(2+)(g)rarrAI^(3+)(g),,DeltaH_(IE)=(+)ve,"because of the removal of electron from cation"):}`