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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$\frac{2}{3}A{l_2}{O_3} \to \frac{4}{3}Al + {O_2},{\Delta _r}G = + 940\,kJ\,mo{l^{ - 1}}$
The potential difference needed for the electrolytic reduction of aluminium oxide ............... $\mathrm{V}$
$E_a\ (Kcal/mol)\,||$ Temp. Change $(K)$
$(I)$ $40\,||\,200\, -\, 210$
$(II)$ $80\,||\,200 \,-\, 210$
$(III)$ $40\,||\,300\, -\, 310$
$(IV)$ $80\,||\,300\, -\, 310$