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Chemistry
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
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Q. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
UPSEE
UPSEE 2007
A
$ Cl < F < S < O $
B
$ O < S < F< Cl $
C
$ S < O < Cl < F $
D
$ F < Cl < O < S $
Solution:
The correct order of electron gain enthalpy (electron affinity) is $O < S < F < Cl$
$\begin{matrix}\text{Element}&O&S&F&Cl\\ \text{Electron affinity}&1.48&2.07&3.45&3.61\end{matrix}$
in $eV$