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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?

Similar Questions

Which of the following has the highest electron affinity?

When the first electron gain enthalpy $(\Delta _{eg}H)$ of oxygen is $-141 \ kJ/mol,$ its second electron gain enthalpy is

Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.

In which of the following pairs,electron gain enthalpies of constituent elements are nearly the same or identical?
$A$. $Rb$ and $Cs$
$B$. $Na$ and $K$
$C$. $Ar$ and $Kr$
$D$. $I$ and $At$
Choose the correct answer from the options given below.

In which of the following is the electron gain enthalpy of elements correctly arranged?

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