Question

Which of the following represents correct acidity order $Li_{2}O$, $BeO$ and $B_{2}O_{3}$ ?

• A. $Li_{2}O <\, BeO < \, B_{2}O_{3}$
• B. $B_{2}O_{3} < \, BeO < \, Li_{2}O$
• C. $BeO <\, Li_{2}O < \, B_{2}O_{3}$
• D. $BeO <\, B_{2}O_{3} < \,Li_{2}O$

Answer 1

Answer: (A)

The chemical nature of oxides of elements changes across the period as Basic oxide $\to$ Amphoteric oxide $\to$ Acidic oxide

Thus, the correct increasing order of acidity is

$Li _{2} O < BeO < B _{2} O _{3}$