MCQ
Most reducing agent is
- ✓$K$
- B$Mg$
- C$Al$
- D$Ba$
So, $Na\, <\, K ; Mg \,<\, Ca$
Alkali metals are strong reducing agents that alkaline earthmetals. so, $K\, >\, Mg$
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$F{e^{2 + }} + 2{e^ - } \to Fe( - 0.44\,V)$
$N{i^{2 + }} + 2{e^ - } \to Ni( - 0.25\,V)$
$S{n^{2 + }} + 2{e^ - } \to Sn( - 0.14V)$
$F{e^{3 + }} + {e^ - } \to F{e^{2 + }}( - 0.77\,V)$
$A \,|\, A^+\, (xM)\, ||\, B^+ \,(yM)\, |\, B$
The $emf$ measured is $+ 0.20\, V.$ The cell reaction is
The two products formed in above reaction are -