$A{l_2}{O_3},Si{O_2},{P_2}{O_3}$ તથા $S{O_2}$ ની એસિડિક પ્રબળતાનો સાચો ક્રમ જણાવો.
AIEEE 2004, Medium
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d (d) With decrease in size from $Al$ to $S$ the basic nature of oxide decrease and acidic nature increases. $A{l_2}{O_3} < Si{O_2} < {P_2}{O_3} < S{O_2}$ $A{l_2}{O_3}$ is amphoteric, $Si{O_2}$ is slightly acidic whereas ${P_2}{O_3}$ and $S{O_2}$ are the anhydrides of acids ${H_3}P{O_3}$ and ${H_2}S{O_3}$.
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