MCQ
An amphoteric oxide: $Al _2 O _3$ (shows both acidic and basic properties)
- A$SO _2$
- ✓$SiO _2$
- C$Al _2 O _3$
- DMgO
✓
Answer
Correct option: B.
$SiO _2$
A covalent oxide of a metalloid: $SiO _2$ (Si is a metalloid)
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