Which of the following oxide is most acidic?

N a_{2} O

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M g O

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S i O_{2}

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C l_{2} O_{7}

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Solution

The correct option is D $C l_{2} O_{7}$
$N a_{2} O$ , MgO are basic oxides.
$C l_{2} O_{7}$ has highest acidity because it is an oxide of non metal .
Non metallic oxides are acidic
This oxide reacts with water to give $H C l O_{4}$ i,e,. strong acid.
So,

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