Which of the following is the strongest acid?

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Question

(A) The basic nature of oxides decreases across a period as metallic character decreases,while the acidic nature of oxides increases. $Na_2O$ and $CaO

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$Al_2O_3$

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(A) The basic nature of oxides decreases across a period as metallic character decreases,while the acidic nature of oxides increases. $Na_2O$ and $CaO$ are strongly basic. $MgO$ is basic. $Al_2O_3$ is amphoteric in nature,meaning it acts as both an acid and a base. Among the given options,$Al_2O_3$ exhibits the most acidic character compared to the others which are basic.

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