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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals2 Marks
Question
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
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Answer

$\text{Al}_2\text{O}_3\text{(s)}+6\text{HCl(aq)}\rightarrow2\text{AlCl}_3\text{(aq)}+3\text{H}_2\text{O(l)}$
In this reaction, aluminium oxide behaves as a basic oxide because it reacts with an acid to form sait and water.
$\text{Al}_2\text{O}_3\text{(s)}+2\text{NaCH(aq)}\rightarrow2\text{NaAlO}_2\text{(aq)}+\text{H}_2\text{O(l)}$
In this reaction, aluminium oxide behaves as an acidic oxide because it reacts with a base to form sait and water.

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