Question

what is amphoteric oxides....?​

Answer 1

ATMOSPHERIC OXIDES

In chemistry, an amphoteric compound is a molecule or ion that can react both as an acid and as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. Amphoterism depends on the oxidation states of the oxide. Al2O3 is an example of an amphoteric oxide.

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Answer 2

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• Oxides of metals that show both acidic as well as basic nature are called amphoteric oxides.

• Such as the oxides of Aluminium and Zinc.

• For example :- $Al_2 O_3 (basic) + HCl \implies AlCl_3 + H_2 O$ and $Al_2 O_3 (acidic) + NaOH \implies NaAlO_2 + H_2 O$

• They show their nature according to what they are reacted with.

• As in the first chemical equation, when the aluminium oxide is reacted with HCl is shows basic nature.

• Whereas when it is reacted with a base, it shows acidic nature.

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