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Question

Identify the element that forms amphoteric oxide

A
Carbon
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B
Zinc
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C
Calcium
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D
Sulphur
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Solution

The correct option is B Zinc
The oxides which can react with both acid and base to give a salt are called amphoteric oxides. Oxides of carbon and sulphur are acidic and the oxide of calcium is basic. Zinc forms an amphoteric oxide.
ZnO+HClZnCl2+H2OZnO+2NaOHNa2ZnO2+H2O

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