Periodic TableMedium
Question
Among the following options, the correct trend in the electron gain enthalpy is
Options
A.$Cl > F > Br > I$
B.$I > Br > Cl > F$
C.$F > Cl > Br > I$
D.$Br > Cl > F > I$
Solution
Sol. [Key Concept: Trend of electron gain enthalpy]
| Group 17 Elements | Electron gain enthalpy (kJ/mol) |
|---|---|
| F | -328 |
| Cl | -349 |
| Br | -325 |
| I | -295 |
So, the correct order of electron gain enthalpy is $Cl > F > Br > I$.
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