Which of the following forms amphoteric
oxides in presence of oxygen?
A Aluminium B. Zinc
C. Magnesium D. Copper
A Only A
B Both A and B
C Both B and D
D Only D
Answers
Answered by
0
Answer:
B both A and B
aluminium and zinc both form amphoteric oxides
Answered by
0
Answer:
Both A and B
Step-by-step explanation:
Reaction of Aluminium oxide with an acid
Al2O3(s) + 6HCl (aq) ---> 2AlCl3 (aq) + 3H2O (l)
Reaction of Aluminium oxide with a base (NaOH)
Al2O3 (s) +2NaOH (aq) ---- 2NaAlO2 +H2O
Reaction of Zinc Oxide with acid
ZnO + 2HCl ---- ZnCl2 + H2O
REACTION OF ZINC OXIDE WITH BASE
ZnO + 2NaOH ---- Na2ZnO2 + H2O
Since, oxides of aluminium and zinc both reacts with an acid and a base. So they form amphoteric oxides.
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