Question

In the following reactions, $ZnO$ is respectively acting as a/an:
(a) $ZnO+N{a}_{2}O\to N{a}_{2}Zn{O}_2$
(b) $ZnO+C{O}_2\to ZnC{O}_3$

• A. Base and base
• B. Acid and acid
• C. Acid and base
• D. Base and acid

Answer 1

The correct option is C Acid and base

$ZnO+N{a}_{2}O\to N{a}_{2}Zn{O}_2$

Sodium oxide $\left(N{a}_{2}O\right)$
is basic in nature according to the following equation:

$N{a}_{2}O+H_{2}O$ $\to$ $2NaOH$
$Base$

Compounds that react with a base to produce a neutral salt are acids and thus in this case $ZnO$ behavies as an acid.

$ZnO+C{O}_2\to ZnC{O}_3$

Carbon dioxide is acidic in nature according to the following equation:

$C{O}_2+H_{2}O$$\to$ $H_{2}C{O}_3$
$acid$

Compounds that react with an acid to produce a neutral salt are bases and thus in this case $ZnO$ behavies as a base.