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QJEEM21Ch86da: JEE Main 2021 Chemistry - Class 11 JEEM21Ch86da Solution: The absolute value of the electron gain enthalpy of halogens…

The absolute value of the electron gain enthalpy of halogens satisfies :

Multiple Choice Options

  • A Cl > Br > F > I
  • B Cl > F > Br > I
  • C I > Br > Cl > F
  • D F > Cl > Br > I

Step-by-Step Verified Solution

The magnitude of electron gain enthalpy of halogen atoms down the group show abnormal behavior. The |ΔHeg| of F is lower than that of Cl due to its smaller size. The incoming electron experiences higher repulsive force due to valence electrons of F than Cl. The correct order is Cl > F > Br > I.

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