Question

Complete the following

$$\begin{gathered} {\mathrm{O}}_2+\mathrm{coke}\to \mathrm{gas}\mathrm{Y} \\ \mathrm{Gas}\mathrm{Y}+\mathrm{coke}\to \mathrm{gas}\mathrm{Z} \\ \mathrm{Gas}\mathrm{Z}+\mathrm{iron}\mathrm{oxide}\to \mathrm{gas}\mathrm{Y}+\mathrm{Iron} \end{gathered}$$

Answer 1

1. Coke burns in the presence of air and gives carbon dioxide $\left({\mathrm{CO}}_2\right)$.

$$\begin{gathered} {\mathrm{O}}_2\left(\mathrm{g}\right)+\mathrm{C}\left(\mathrm{s}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{oxygen}\mathrm{coke}\mathrm{carbon} \\ \mathrm{dioxide} \end{gathered}$$

2. The carbon dioxide reacts with coke $\left(\mathrm{C}\right)$ giving carbon monoxide $\left(\mathrm{CO}\right)$.

${\mathrm{CO}}_2\left(\mathrm{g}\right)+\mathrm{C}\left(\mathrm{coke}\right)\to 2\mathrm{CO}\left(\mathrm{g}\right)$

3. The carbon monoxide reduces the iron oxide$\left({\mathrm{Fe}}_2{\mathrm{O}}_3\right)$ to iron by releasing carbon dioxide $\left({\mathrm{CO}}_2\right)$.

$3\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{Fe}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)\to 3{\mathrm{CO}}_2\left(\mathrm{g}\right)+2\mathrm{Fe}\left(\mathrm{l}\right)$

Hence, $\mathbf{Gas}\mathbf{}\mathbf{Y}$ is ${\mathbf{CO}}_{\mathbf{2}}$ and $\mathbf{Gas}\mathbf{}\mathbf{Z}$ is $\mathbf{CO}$.