Question

Sugar on treating with $H_{2}S{O}_4$ produces a black mass. In this $H_{2}S{O}_4$ acts as:

• A. decarboxylating agent
• B. dehydrogenating agent
• C. dehydrating agent
• D. reducing agent

Answer 1

Answer: (C)

dehydrating agent

When sugar $\left(C_{12}{H}_{22}{O}_{11}\right)$ reacts with $H_{2}S{O}_4$, it $\left(H_{2}S{O}_4\right)$ reacts as dehydrating agent to release water.

$C_{12}{H}_{22}{O}_{11}+H_{2}S{O}_4\to {12}^{\prime }{C}^{\prime }\left(carbon\right)+11H_{2}O+heat$

$sugar$ $blackmass$

$H_{2}O$ evaporates in presence of heat