JEE MAIN - Chemistry (2023 - 6th April Evening Shift - No. 8)
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?
Al$$_2$$O$$_3$$
TI$$_2$$O$$_3$$
B$$_2$$O$$_3$$
Ga$$_2$$O$$_3$$
Explanation
As electropositive character increases basic character of oxide increases.
$$ \underbrace{\mathrm{B}_2 \mathrm{O}_3}_{\text {acidic }}<\underbrace{\mathrm{Al}_2 \mathrm{O}_3<\mathrm{Ga}_2 \mathrm{O}_3}_{\text {amphoteric }}<\underbrace{\mathrm{In}_2 \mathrm{O}_3<\mathrm{Tl}_2 \mathrm{O}_3}_{\text {basic }} $$
$$ \underbrace{\mathrm{B}_2 \mathrm{O}_3}_{\text {acidic }}<\underbrace{\mathrm{Al}_2 \mathrm{O}_3<\mathrm{Ga}_2 \mathrm{O}_3}_{\text {amphoteric }}<\underbrace{\mathrm{In}_2 \mathrm{O}_3<\mathrm{Tl}_2 \mathrm{O}_3}_{\text {basic }} $$
Comments (0)
