JEE Previous Year Question

Among the following oxide of p - block elements, number of oxides having amphoteric nature is ${\text{Cl}}_2{O}_7\text{,}\text{CO}\text{,}{\text{PbO}}_2\text{,}{N}_{2}O\text{,}\text{NO}\text{,}{\text{Al}}_2{O}_3\text{,}{\text{SiO}}_2\text{,}{N}_2{O}_5\text{,}{\text{SnO}}_2$

Topic: JEE PYQ

Answer: 3. Full step-by-step solution below.