Choose the correct order for the magnitudes of electron gain enthalpy.

F > B r > O > S

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F > S > B r > O

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F > B r > S > O

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S > F > B r > O

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Solution

The correct option is B $F > B r > S > O$
$E . A = F > B r > S > O$
On moving from left to right in period $E . A$ increases due to more $Z_{e f f} ($ small size $),$ but when small size atom like Oxygen in it's group faces more repulsion upon incoming electron so it's $E . A$ is less than $S .$

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