Question

Among the chalcogens, the element that forms an amphoteric dioxide is:

• A. Sulphur
• B. Selenium
• C. Tellurium
• D. Polonium

Answer 1

Answer: (C)

Going down the group, elements like Tellurium which exhibit a wide variety of oxidation numbers may have one or more oxides that exhibit only basic properties and one or more oxides that exhibit only acidic properties, that's why it shows amphoteric oxides.