p-Block Elements-I 2 Question 13
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13. Which one of the following oxides is neutral ?
======= ####13. Which one of the following oxides is neutral ?
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{CO}$
(b) $\mathrm{SnO}_{2}$
(c) $\mathrm{ZnO}$
(d) $\mathrm{SiO}_{2}$
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Solution:
- Carbon monoxide is a neutral oxide, all others are amphoteric :
$$ \begin{aligned} \mathrm{SnO}{2}+4 \mathrm{HCl} & \longrightarrow \mathrm{SnCl}{4}+2 \mathrm{H}{2} \mathrm{O} \ \mathrm{ZnO}+2 \mathrm{HCl} & \longrightarrow \mathrm{ZnCl}{2}+\mathrm{H}{2} \mathrm{O} \ \mathrm{SiO}{2}+2 \mathrm{NaOH} & \longrightarrow \mathrm{Na}{2} \mathrm{SiO}{3}+\mathrm{H}_{2} \mathrm{O} \end{aligned} $$
$\mathrm{SnO}{2}$ and $\mathrm{ZnO}$ also react with $\mathrm{NaOH}$. $\mathrm{SiO}{2}$ is also attacked by $\mathrm{H}{3} \mathrm{PO}{4}$.
