MCQ
Amphoteric oxide(s) of $Mn$ is/are
- A$MnO_2$
- B$Mn_3O_4$
- C$Mn_2O_7$
- ✓Both $(a)$ and $(b)$
Amphoteric oxides have features of acidic as well as basic oxides that neutralise both acids and bases.
Oxides in the lower oxidation state are basic and in higher oxidation state, they are acidic. In the intermediate state they are amphoteric.
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$ {\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)\right]^{+}+\mathrm{NH}_3 \rightleftharpoons\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+} ; \mathrm{k}_2=1.7 \times 10^{-3}}$
then the formation constant of $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$is
| List $I$ | List $II$ | ||
| $A$ | $\alpha$-Glucose and $\alpha-$Galactose | $I$ | Functional isomers |
| $B$ | $\alpha$-Glucose and $\beta-$-Galactose | $II$ | Homologous |
| $C$ | $\alpha$-Glucose and $\alpha$-Galactose | $III$ | Anomers |
| $D$ | $\alpha$-Glucose and $\alpha$-Galactose | $IV$ | Epimers |
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