Question

# Which acid produces sugar charcoal from sugar?

Hint: Acids are the chemical species which have their $pH$ range $0 - 7$ . These substances neutralize alkalis. Charcoal sugar is produced by the dehydration of sugar. Sugar charcoal is the purest form of amorphous charcoal.
We know charcoal sugar is produced by the dehydration of sugar. It is the black residue of carbon. This means if we remove water from sugar, charcoal sugar will be formed. So, we have to find the acid which helps in dehydration. Sulphuric acid $\left( {{H_2}S{O_4}} \right)$ is the acid which helps in dehydration. This acid acts as a dehydrating agent. When sulphuric acid will be added to sugar the reaction that will take place is:
${C_{12}}{H_{22}}{O_{11}} + {H_2}S{O_4}\xrightarrow{{}}12C + 11{H_2}O$