MCQ
Among the following compounds, the most acidic is
- A$p$-nitrophenol
- B$p$-hydroxybenzoic acid
- ✓$o$-hydroxybenzoic acid
- D$p$-toluic acid
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$Zn^{2+} + 2e^-$ $\longrightarrow$ $Zn (s) ; E^o = -0.76\,V$
$Ca^{2+} + 2e^-$ $\longrightarrow$ $Ca (s) ; E^o = -2.87\,V$
$Mg^{2+} + 2e^-$ $\longrightarrow$ $Mg (s) ; E^o = -2.36\,V$
$Ni^{2+} + 2e^-$ $\longrightarrow$ $Ni (s) ; E^o = -0.25\,V$
The reducing power of the metals increases in the order
$R - X + AgN{O_2} \to Q + AgX$
$P$ and $Q$ are related as