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    				| 1. | Identify the element that forms amphoteric oxide.A. CarbonB. ZincC. CalciumD. Sulphur | 
| Answer» Correct Answer - B Zn (zinc) element of forms amphoteric oxide i.e. ZnO. This oxide reacts with both acids and bases, exhibiting a dual behaviour. They show characteristics of both acidic as well as basic oxides. Following reactions are given by ZnO `ZnO+2HCl to ZnCl_(2)+H_(2)O` `ZnO+2NaOHtoNa_(2)ZnO_(2)+H_(2)O` Note : Among oxides, Co is neutral, CaO is basic and `SO_(2)` is acidic in nature. | |