The energy evolved is highest for which of th | vedclass

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Question

(B) The energy evolved during the addition of an electron to a neutral gaseous atom is known as electron gain enthalpy. Among the given options,$Cl$ h

Vedclass · Accepted Answer

$Cl + e^- 	o Cl^-$

Vedclass · Answer

(B) The energy evolved during the addition of an electron to a neutral gaseous atom is known as electron gain enthalpy. Among the given options,$Cl$ has the highest electron gain enthalpy (most negative value),meaning the maximum energy is released when $Cl$ gains an electron to form $Cl^-$. While $F$ is more electronegative,its small size leads to inter-electronic repulsion,making its electron gain enthalpy slightly less negative than that of $Cl$. Processes involving the addition of two electrons (like $O 	o O^{2-}$ or $S 	o S^{2-}$) are endothermic overall because the second electron addition is unfavorable due to electrostatic repulsion.

The energy evolved is highest for which of the following reactions?

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