The most acidic of the following compounds is

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(A) The acidity of oxides generally increases with an increase in the non-metallic character of the central element and its oxidation state. Among the

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$P_2O_3$

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(A) The acidity of oxides generally increases with an increase in the non-metallic character of the central element and its oxidation state. Among the given oxides,$P_2O_3$ is the oxide of phosphorus,which is a non-metal,while $B_2O_3$,$As_2O_3$,and $Sb_2O_3$ are oxides of elements with more metallic or metalloid character compared to phosphorus. $P_2O_3$ is the most acidic oxide among the choices provided because phosphorus is the most non-metallic element in this group.

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