Which of the following is amphoteric-

Concept:

• Oxides are compounds formed by the reaction of metals, nonmetals with oxygen. The types of oxides are:
• Basic oxide: It is a complex chemical substance oxide, which forms a salt with the chemical reaction with acids or acidic oxides and does not react with bases or basic oxides.
• E.g. Copper oxide (Cu2O), Magnesium oxide (MgO)
• Acidic oxide: It is a complex chemical substance oxide, which forms a salt with the chemical reactions with bases or basic oxides and does not react with acidic oxides.
• E.g. Carbon dioxide (CO2), Silicon dioxide (SiO2)
• Amphoteric oxide: It is an oxide which forms a salt with chemical reactions with acids (or acid oxides) and with bases (or basic oxides).
• E.g. Copper, Zinc, Tin, Lead, Aluminum, and Beryllium.

​Explanation:

• Li2O is a basic oxide. It hydrolyses to give a basic solution.
• ZnO is an amphoteric or neutral oxide.
• ZnO hydrolysis to give a neutral solution.
• SO₂ is an acidic oxide. It hydrolysis to give an acidic solution.

Hence, the amphoteric oxide is ZnO.