Question

Which element among the following cannot form an amphoteric oxide?

• A. $Al$
• B. $Sn$
• C. $Sb$
• D. $P$

Answer 1

Answer: (D)

Phosphorus being a non-metal always forms acidic oxides like ${\text{P}}_4{\text{O}}_6,{\text{P}}_4{\text{O}}_{10},$ etc. whereas $Al,Sn$ and $Sb$ are amphoteric elements.
$\text{A}{\text{l}}_2{\text{O}}_3,\text{S}\text{n}\text{O}$ and $\text{S}{\text{b}}_2{\text{O}}_3$ are amphoteric oxides i.e., they can react with both acids as well as bases.