MCQ
Among the fluorides below, the one which does not exist is
- A$Xe{F_4}$
- ✓$He{F_4}$
- C$S{F_4}$
- D$C{F_4}$
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Given that :
$F{e^{2 + }} + 2{e^ - } \to Fe;$ ${E^o}_{F{e^{2 + }}/Fe} = - 0.47\,V$
$F{e^{3 + }} + {e^ - } \to F{e^{2 + }};$ ${E^o}_{F{e^{3 + }}/F{e^{2 + }}} = + 0.77\,V$

$\left[\right.$ Given $\left.\mathrm{R}=8.314 \,\mathrm{JK}^{-1} \,\mathrm{~mol}^{-1}\right]$