Question

What is the product obtained when Br₂ water reacts with glucose?

Options

• Gluconic acid

• 1, 6-Dibromoglucose

• Saccharic acid

• Bromohexane

Answer 1

Gluconic acid

Explanation:

When glucose is treated with bromine water, it undergoes oxidation, forming gluconic acid. (In this aldehydic group is oxidized to carboxylic acid).

\[\begin{array}{cc}
\phantom{.}\ce{CHO}\phantom{..................}\ce{COOH}\phantom{..}\\
\phantom{.}|\phantom{.......................}|\phantom{.......}\\
\ce{(CHOH)4 + [O] ->[Br2/H2O] (CHOH)4}\\
\phantom{.}|\phantom{.......................}|\phantom{.......}\\
\phantom{..}\ce{\underset{Glucose}{CH2OH}}\phantom{...............}\ce{\underset{Gluconic acid}{CH2OH}}\phantom{}
\end{array}\]