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Question

Metals combine with oxygen to form ______ oxides.

A
acidic
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B
basic
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C
amphoteric
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D
none of the above
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Solution

The correct option is B basic
When metal reacts with oxygen they form metal oxides. When oxides reacts with water they form metal hydroxides.
Eg : Mgo + H2O Mg(OH)2
Metal Water Metallic
oxide hydroxide
When metal oxides reacts with dilute acids, they form salt and water.
Eg : Mgo + 2HCl MgCl2 + H2O
Metal dilute acid salt water
oxide
Hence metallic acids are basic in nature and are known as basic acids.

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