Question

Choose the most appropriate answer from the following list of oxides which fit the description. Each answer may be used only once : 

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O] 

(i) A basic oxide. 

(ii) An oxide which dissolves in water forming an acid. 

(iii) An amphoteric oxide. 

(iv) A covalent oxide of a metalloid.

Answer 1

(i) Na₂O 

(ii) So₂ 

(iii) Al₂O₃ 

(iv) SiO₂.