JEE MAIN - Chemistry (2020 - 7th January Morning Slot - No. 16)
The electron gain enthalpy (in KJ/mol) of fluorine, chlorine, bromine and iodine, respectively are:
-296, -325, -333 and -349
349, -333, -325 and -296
-333, -349, -325 and -296
-333, -325, -349 and -296
Explanation
Order of electron gain enthalpy (magnitude) is
Cl > F > Br > I
Note: Electron gain enthalpy increases with electro negativity but chlorine has higher electron gain enthalpy than fluorine (exception).
Note: Electron gain enthalpy increases with electro negativity but chlorine has higher electron gain enthalpy than fluorine (exception).
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