Question

which is amphoteric oxide in character a)CaO b)CO2 c)SiO2 d)SnO2

Answer 1

Option D - SnO2(Tin dioxide)

Answer 2

Answer: Option (c) is the correct answer.

Explanation:

Amhoteric oxides are defined as the species which can either donate or accept a proton.

• Non-metals are the species which tend to form acidic oxides.

For example, $CO_{2}$ can form $H_{2}CO_{3}$ on reaction with water.

• Metals tend to form basic oxides.

For example, Ca is a metal and it will form $Ca(OH)_{2}$ when CaO reacts with water.

           $CaO + H_{2}O \rightarrow Ca(OH)_{2}$

• Metalloids are the species which show properties of both metals and non-metals.

And, metalloids tend to form both basic and acidic oxides. As silicon is a metalloid therefore, it will form both acidic and basic oxides.

Thus, we can conclude that out of the given options $SiO_{2}$ is amphoteric oxide in character.