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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Which among the following elements has highest negative electron gain enthalpy?

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Correct option: B

\mathrm{Cl}

Option B is correct because chlorine has the highest negative electron gain enthalpy due to its smaller size and effective nuclear charge compared to bromine and iodine, and less electron-electron repulsion than fluorine.

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