What are $X, Y$ and $Z$ in the following reactions? $ \begin{aligned} & \mathrm{CaCO}_3…
What are $X, Y$ and $Z$ in the following reactions?
$
\begin{aligned}
& \mathrm{CaCO}_3 \stackrel{\Delta}{\rightleftharpoons} \mathrm{CO}_2+X \\
& X+\mathrm{H}_2 \mathrm{O} \longrightarrow Y \\
& Y+\mathrm{Cl}_2 \longrightarrow Z \\
& X \quad Y \quad Z
\end{aligned}
$
$\begin{aligned} \mathrm{CaCO}_3 & \stackrel{\Delta}{\rightarrow} \mathrm{CO}_2+\mathrm{CaO} \\ \mathrm{CaO}+\mathrm{H}_2 \mathrm{O} & \rightarrow \mathrm{Ca}(\mathrm{OH})_2 \\ \mathrm{Ca}(\mathrm{OH})_2+\mathrm{Cl}_2 & \rightarrow \mathrm{CaOCl}_2 \cdot \mathrm{H}_2 \mathrm{O}\end{aligned}$
Calcium carbonate is strongly heated until it undergoes thermal decomposition to form calcium oxide and carbon dioxide. The calcium oxide is dissolved in water to form calcium hydroxide.