question_answer

Explain the following with examples:

(i) Acidic oxides

(ii) Basic oxides

(iii) Amphoteric oxides

(iv) Neutral oxides

Answer:

(i) Acidic oxides: Non-metals burn in oxygen and form acidic oxides. These form an acid on treatment with water. Such oxides turn blue litmus red. For example, carbon dioxide\[\left( C{{O}_{2}} \right)\], sulphur dioxide\[\left( S{{O}_{2}} \right)\].

(ii) Basic oxides: These are also called metallic oxides. These oxides form bases on treatment with water. These are generally basic in nature and turn red litmus blue. e.g., sodium oxide\[\left( N{{a}_{2}}O \right)\], magnesium oxide\[(MgO)\].

(iii) Amphoteric oxides: These oxides show properties of both acidic oxides and basic oxides. e.g., aluminium oxide\[\left( A{{l}_{2}}{{O}_{3}} \right)\], silicon dioxide\[\left( Si{{O}_{2}} \right)\].

(iv) Neutral oxides: These are neither acidic nor basic and have no effect on litmus paper. For example, water \[\left( {{H}_{2}}O \right)\].