The difference between electron gain enthalpies will be maximum between:

Question

Canvas Classes · Accepted Answer

Electron gain enthalpies (approximate values):

| Element | EGE (kJ/mol) |
|---|---|
| F | −328 |
| Cl | −349 |
| Ne | +116 |
| Ar | +96 |

Differences:
- Ne and F:  kJ/mol
- Ar and F:  kJ/mol
- Ne and Cl:  kJ/mol ← maximum
- Ar and Cl:  kJ/mol

The maximum difference is between Ne (+116) and Cl (−349).

Answer: Option (3) — Ne and Cl

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