Group-13 elements react with $\mathrm{O}_{2}$ in amorphous form to form oxides of type $\mathrm{M}_{2} \mathrm{O}_{3}~(\mathrm{M}=$ element). Which among the following is the most basic oxide?
Solution
As electropositive character increases basic character of oxide increases.<br/><br/>
$$
\underbrace{\mathrm{B}_2 \mathrm{O}_3}_{\text {acidic }}<\underbrace{\mathrm{Al}_2 \mathrm{O}_3<\mathrm{Ga}_2 \mathrm{O}_3}_{\text {amphoteric }}<\underbrace{\mathrm{In}_2 \mathrm{O}_3<\mathrm{Tl}_2 \mathrm{O}_3}_{\text {basic }}
$$
About this question
Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Periodic Trends
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