Question

Sugar charcoal can be obtained by treating sugar$\left(C_{12}{H}_{22}{O}_{11}\right)$ with .

• A. $\mathrm{conc}.\mathrm{HCl}$
• B. $\mathrm{conc}.H_2{\mathrm{SO}}_4$
• C. $\mathrm{conc}.{\mathrm{HNO}}_3$

Answer 1

The correct option is B $\mathrm{conc}.H_2{\mathrm{SO}}_4$

Sugar charcoal is the purest form of amorphous carbon. It can be prepared by the dehydration of sugar in the presence of concentrated sulphuric acid ($\mathrm{conc}.H_2{\mathrm{SO}}_4$). Since sulphuric acid is a dehydrating agent, it absorbs water from the sugar and leaves behind black residue of carbon.