Question

Which property of sulphuric acid is shown by the reaction of concentrated sulphuric acid with:

Ethanol

Carbon

Answer 1

Ethanol

1. Since, sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ removes water molecule from ethanol and forms ethene, it shows dehydrating property of sulphuric acid .
2. $$\begin{gathered} {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{\mathrm{Heat}}{\to }{\mathrm{C}}_2{\mathrm{H}}_4+{\mathrm{H}}_2\mathrm{O} \\ \left(\mathrm{Ethanol}\right)\left(\mathrm{Ethene}\right) \end{gathered}$$

Carbon

1. Reaction of sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$with carbon $\left(\mathrm{C}\right)$shows its oxidising nature.
2. Carbon dioxide$\left({\mathrm{CO}}_2\right)$, water and sulphur dioxide$\left({\mathrm{SO}}_2\right)$ are the products of this reaction
3. $$\begin{gathered} \mathrm{C}+2{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{CO}}_2+2{\mathrm{H}}_2\mathrm{O}+2{\mathrm{SO}}_2­ \\ \left(\mathrm{Carbon}\right)(\mathrm{Sulphur} \\ \mathrm{dioxide}) \end{gathered}$$