Question

Identify $B$ in the following reaction.
$H_{4}Si{O}_4\begin{array}{c}\underrightarrow{1000}\\ -H_{2}O\end{array}A\begin{array}{c}\underrightarrow{Carbon}\\ \Delta \end{array}B+CO$

• A. Corundum
• B. Quartz
• C. Silica
• D. Carborundum

Answer 1

Answer: (D)

Carborundum

Orthosilicic acid $\left(H_{4}Si{O}_4\right)$, on heating at high temperature, loses two water molecules and gives silica $\left(Si{O}_2\right)$ which on reduction with carbon gives carborundum $\left(SiC\right)$ and $CO$
$H_{4}Si{O}_4\begin{array}{c}\underrightarrow{1000}\\ -2H_{2}O\end{array}Si{O}_2\begin{array}{c}\underrightarrow{C}\\ \Delta \end{array}\begin{array}{c}SiC\\ carborundum\end{array}+CO$