How can we find out that something is mtal or non metallic oxides
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Metal oxides react with acids to form salt and water. So they show basic properties. Non metal oxides react with bases to form salts and water. So they show acidic properties.
So all oxides which show basic properties are metal oxides and those oxides which show acidic properties is known as non-metalic oxides.
Some metal oxides like Al2O3 show both acidic and basic properties . Such oxides are known as amphoteric oxides.
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