Question

Which set does not contain an amphoteric species?

• A. ${Al\left(OH\right)}_3,{Zn\left(OH\right)}_2$
• B. ${SnO}_2,{Al}_2{O}_3$
• C. ${Fe\left(OH\right)}_3,{Ni\left(OH\right)}_2$
• D. All of these

Answer 1

Answer: (C)

${Fe\left(OH\right)}_3,{Ni\left(OH\right)}_2$

The set ${Fe\left(OH\right)}_3,{Ni\left(OH\right)}_2$ does not contain an amphoteric species.
An amphoteric species acts as an acid as well as base.
Only ferric hydroxide is an amphoteric in nature.