MCQ
For a very dilute solution of $\ce{H_3PO_3}$ van't Hoff factor is:
- A$i = 7$
- ✓$i = 3$
- C$i = 4$
- D$i = 5$
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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 ............... $\mathrm{V}$

compound will be: