Correct option is B
The correct answer is: (B) Zinc oxide
An amphoteric oxide is an oxide that can react both as an acid and as a base. Zinc oxide (ZnO) is amphoteric because it reacts with both acids and bases to form salts and water.
- With acids (e.g., hydrochloric acid):
With bases (e.g., sodium hydroxide):
ZnO+2NaOH+H2O→Na2Zn(OH)4
Other options:
- Phosphorus pentoxide (P₄O₁₀): This is an acidic oxide. It reacts with water to form phosphoric acid (H₃PO₄).
- Magnesium oxide (MgO): This is a basic oxide. It reacts with water to form magnesium hydroxide (Mg(OH)₂), which is a base.
- Sulphur dioxide (SO₂): This is an acidic oxide. It reacts with water to form sulfurous acid (H₂SO₃).
Thus, Zinc oxide (ZnO) is the only amphoteric oxide among the options.
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