Question

What do you mean by amphoteric oxides? Choose the amphoteric oxides among the following-
ZnO, Na20, Al2O3, CO2✌️​​

Answer 1

1. Explanation:An amphoteric oxide is an oxide that can act as either an acid or base in a reaction to produce a salt and water. Amphoterism depends on the oxidation states available to a chemical species.
2. Because metals have multiple oxidation states, they form amphoteric oxides and hydroxidesAl2O3 is an amphoteric oxide.
3. When reacted with HCl, it acts as a base to form the salt AlCl3. When reacted with NaOH, it acts as an acid to form NaAlO2.
4. Typically, oxides of medium electronegativity are amphoteric.

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