Question

Which of the following oxides is most basic and most acidic respectively?
I. $N _{2} O _{5}$
II. $H _{2} O$
III. $K _{2} O$
IV. $CaO$
V. $SO _{3}$
Choose the correct option.

• A. II and III
• B. I and V
• C. III and V
• D. IV and I

Answer 1

Answer: (D)

$CaO$ is the most basic oxide.
$N _{2} O _{5}$ is the most acidic oxide.