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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species? [UP SEE 2007]

Answer: (B)

Solution

Approximate electron affinities (eV): O = 1.48, S = 2.07, F = 3.45, Cl = 3.61. The small, electron-dense period-2 atoms O and F have lower electron gain enthalpy magnitudes than their period-3 analogues S and

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Question ID VK-133199