Question

Among the following Oxides, how many of them are amphoteric oxides

a) B2O3 b) Al2O3 c) CaO d)ZnO e) Ga2O3 f) SnO2
g) PbO2 h) BeO i) CuO
j) Fe2O3 ​

Answer 1

Answer:

THE ANSWER IS OPTION B AND OPTION D

Explanation:

Al2O3 AND ZnO2 ARE AMPHOTERIC OXIDES BECAUSE THEY SHOW BOTH ACIDIC AND BASIC NATURE .THE REACT WITH BOTH ACIDS AND BASES TO FORM SALT AND WATER

Answer 2

Among the following Oxides, b) Al2O3 d)ZnO f) SnO2 g) PbO2 h) BeO are amphoteric oxides

• Generally, metals react with bases to form metal oxides which are basic in nature. But exceptionally there are few cases where metal oxides which react with both acids and bases. These oxides are referred as amphoteric oxides.
• This happens generally because the electronegativity difference between the metal and oxygen is very small.
• So, from the given options b) Al2O3 d)ZnO f) SnO2 g) PbO2 h) BeO are amphoteric oxides.