Oxides and hydroxides of Zn, Pb & Al are amphoteric in nature...give reason
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Zinc oxide is amphoteric because it reacts with both acids and bases to form salts.
Metal oxides which react with both acids as well as bases to produce salts and water are known as amphoteric oxides. Many metals (such as 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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