Question
The value of $2^{nd}$ $e^-$ gain enthalpy for $O$ and $S$ will be (in $KJ / mole$)

Answer

c
The second electron gain enthalpies (in $k J / m o l$ ) of oxygen and sulphur respectively are +780 and $+590 .$

Both are positive as they attain noble gas configuration after gaining two electrons.

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