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Question

Metal oxides which react with both acids and bases to produce salt and water are known as:

A
non-metals
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B
amphoteric oxides
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C
basic oxides
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D
acidic oxides
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Solution

The correct option is B amphoteric oxides
Amphoteric oxides are oxides which either donate or accept a proton.

Hence these metal oxides react with both acids and bases to form salt and water.

The best example is that of Al2O3.

Al2O3+2NaOH2NaAlO2+H2O

Al2O3+6HCl2AlCl3+3H2O

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