Which one of the elements has the maximum ele | vedclass

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(B) The correct answer is $(B)$.Although $F$ has the highest electronegativity,its electron affinity is lower than that of $Cl$ due to its very small

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$Cl$

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(B) The correct answer is $(B)$.Although $F$ has the highest electronegativity,its electron affinity is lower than that of $Cl$ due to its very small atomic size.In $F$,the incoming electron experiences significant inter-electronic repulsions from the already present electrons in the small $2p$ subshell.$Cl$,being larger,can accommodate the incoming electron more easily,resulting in a higher energy release (more negative electron gain enthalpy).

List-$I$ (Element)	List-$II$ (Electron gain enthalpy in $kJ \ mol^{-1}$)
$(A)$ $F$	$(I)$ $-141$
$(B)$ $Cl$	$(II)$ $-328$
$(C)$ $O$	$(III)$ $-200$
$(D)$ $S$	$(IV)$ $-349$

Which one of the elements has the maximum electron affinity?

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Which elements have the most positive and most negative electron gain enthalpy,respectively?

Match the following elements in List-$I$ with their respective electron gain enthalpy values in List-$II$:
List-$I$ (Element) List-$II$ (Electron gain enthalpy in $kJ \ mol^{-1}$)
$(A)$ $F$ $(I)$ $-141$
$(B)$ $Cl$ $(II)$ $-328$
$(C)$ $O$ $(III)$ $-200$
$(D)$ $S$ $(IV)$ $-349$

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