MCQ
Aqueous solution of which salt will not contain ions with the electronic configuration $1s^2\,2s^2\,2p^6\,3s^2\,3p^6$ ?
- ✓$NaF$
- B$KBr$
- C$NaCl$
- D$CaI_2$
$N{a^ + } \to [He]\,2{s^2}\,2{p^6}$
${F^ - } \to [He]\,2{s^2}\,2{p^6}$
Hence do not match with the configuration given in the question.
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$\left[\begin{array}{l} E _{ Fe ^{2+} / Fe ( s )}^{ o }=-0.440 V ; E _{ Fe ^{3+} / Fe ( s )}^{\circ}=-0.036 V \\ E _{ I _{2} / 2 I ^{-}}^{ o }=0.539 V ; \quad F =96500\, C \end{array}\right]$