How will you prove that a l2 o3 is an amphoteric oxide?
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Explanation:
A amphoteric oxide is the one which reacts with both alkali and acid to form salt and water
therefore action of Al2O3 with NaOH
Al2O3 + NaOH = 2 NaAlO2 + H2O
action of HCl on Al2O3
Al2O3 + HCl = AlCl3 + H2O
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