In which of the following processes is energy | vedclass

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(C) The process $Cl + e^{-} \rightarrow Cl^{-}$ represents the addition of an electron to a neutral chlorine atom to form a chloride ion.This process

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$Cl + e^{-} \rightarrow Cl^{-}$

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(C) The process $Cl + e^{-} \rightarrow Cl^{-}$ represents the addition of an electron to a neutral chlorine atom to form a chloride ion.This process completes the octet of the chlorine atom,which is a stable configuration.Energy is released during this process,which is known as the electron gain enthalpy (or electron affinity).In contrast,$Cl \rightarrow Cl^{+} + e^{-}$ is an ionization process requiring energy,$HCl \rightarrow H^{+} + Cl^{-}$ is a bond dissociation process requiring energy,and $O^{-} + e^{-} \rightarrow O^{2-}$ is an endothermic process due to inter-electronic repulsion.

In which of the following processes is energy liberated?

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