Amphoteric behaviour is shown by the oxides of:
(1) Al and Ca
(3) Cr and Mg
(2) Pb and Ba
(4) Ge and AI
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Explanation:
..........use the pic
Amphoteric oxides can behave as an acid as well as base. They react with both acids and bases to form salts. Tin oxide although doesn't dissolve in water but it is amphoteric in nature. Zinc oxide is also amphoteric in nature.
ZnO+HCl→ZnCl
2
+H
2
O
ZnO+NaOH→Na
2
ZnO
2
+H
2
O
SnO
2
+HCl→SnCl
4
+H
2
O
SnO
2
+NaOH+H
2
O→Na
2
[Sn(OH)
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