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Arrange the following compounds in incre...

Arrange the following compounds in increasing order of acidic strength `Al_2O_3` , `SiO_2` , `P_2O_3` and `SO_2`.

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Along the period acidity of oxides increases as the electronegativity difference between element and oxygen decreases `Al_2O_3 lt SiO_2 lt P_2O_3 lt SO_2`
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