Question

Which of following oxides is acidic in nature?

• A. $B_{2}O_{3}$
• B. $Al_{2}O_{3}$
• C. $Ga_{2}O_{3}$
• D. $In_{2}O_{3}$

Answer 1

Answer: (A)

$B_{2}O_{3}$

Answer 2

: $B_{2}O_{3}$ is acidic and reacts with basic (metallic) oxides forming metal borates. Aluminium and gallium oxides are amphoteric and those of indium and thallium are basic in their properties.