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Chemistry · PYQ NEET UG 2026
हिन्दीAmong the following options, the correct trend in the electron gain enthalpy is
Correct answer · Option 3
$\text{Cl} > \text{F} > \text{Br} > \text{I}$
Explanation
Due to small size and high electron-electron repulsion in the compact 2p orbital of fluorine, its electron gain enthalpy is less negative than that of chlorine. Thus, the magnitude of electron gain enthalpy follows the order $\text{Cl} > \text{F} > \text{Br} > \text{I}$.
