What happenes when `D-`glucose is treated with the following reagents?
(i). `HI`
(ii).Bromine water
(iii). `HNO_(3)`

Options

A. gluconic acid
B. oxalic acid
C. glucuronic acid
D. glucaric acid

Answer

A

Explanation

Monosaccharides do not undergo isomerization and fragmentation reactions in mildly acidic solution. Thus, a useful oxidizing agent for preparative prupose is bromine in water `(pH 6.0)`. Bromine water is a general reagent that selectively oxidizes the `-CHO` group to a `- CO_(2)H` grouup. It converts an aldose to an aldonic acid.
`underset("Aldose")underset(CH_(2)OH)underset(|)overset(CHO)overset(|)((CHOH)_(n))underset(H_(2)O)overset(Br_(2))rarrunderset("Aldonic acid")underset(CH_(2)OH)underset(|)overset(CO_(2)H)overset(|)((CHOH)_(n))`
Gluconic acid obtained by the oxidation of glucose is used for cleaning metals.