Question

Which of the following is the most basic oxide ?

• A. $Al_2O_3$
• B. $Sb_2O_3$
• C. $Bi_2O_3$
• D. $SeO_2$

Answer 1

Answer: (C)

$Bi_2O_3$

Answer 2

$Al _{2} O _{3}$ and $Sb _{2} O _{3}$ are amphoteric, $SeO _{2}$ is acidic and $Bi _{2} O _{3}$ is basic