Which of the following oxides is amphoteric is nature ?

Options

A. CaO
B. `CO_(2)`
C. `SiO_(2)`
D. `SnO_(2)`

Answer

D

Explanation

Oxide of metalloid is generally amophoteric in character . Out of the given four oxide only `SnO_(2)` is amphoteric in character because `SnO_(2)` dissolves both in acids and bases.
`SnO_(2)+2HCl to SnCl_(4) +2H_(2)O`
`SnO_(2)+2NaOH to Na_(2)SnO_(3)+H_(2)O`
on the other hand `SiO_(2)` dissolves only in bases `SiO_(2)+2NaOH to Na_(2)SiO_(3)+H_(2)O`
Thus `SiO_(2) ` is not considered amphoteric in nature.