MCQ
Hydrogen cannot reduce
- A$\mathrm{Fe}_2 \mathrm{O}_3$
- B$\ce{Cuo}$
- C$\mathrm{SnO}_2$
- ✓$\mathrm{Al}_2$
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$(I)$ $NI_3$ $(II)$ $I_3^-$
$(III)$ $SO_3^{-2}$ $(IV)$ $NO_3^-$
