Question

$pH$ value is greater than 7 for the aqueous solution of:

• A. $S{O}_3$
• B. $N_2{O}_5$
• C. $C{O}_2$
• D. $N{a}_{2}O$

Answer 1

The correct option is D $N{a}_{2}O$

$N{a}_{2}O+H_{2}O\to 2NaOH\left(Base\right)$

while other species in their aqueous solution forms acids thus their pH will be less than 7.

Hence, the correct option is $\text{D}$