JAMB Chemistry
Which of the following contains two amphoteric oxides?
a.
Sodium oxide, Zinc oxide, Magnesium oxide
b.
Aluminum oxide, Calcium oxide, Zinc oxide
c.
Pottasium oxide, Lithium oxide, Carbon dioxide
d.
Silver oxide, Lead oxide, Sodium oxide
Correct answer: B
An amphoteric oxide is a metallic oxide that acts both as an acid and as a base. The two most common amphoteric oxides are Zinc Oxide — and Aluminum oxide — . Aluminum oxide, calcium oxide, zinc oxide is the correct answer as the two most common amphoteric oxides are included among them.