Question

Is Fructose an aldose?

Answer 1

Explanation with a diagram:

1. The chemical formula of Fructose is ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$.
2. A ketohexose, or six-carbon sugar, is an example of fructose.
3. Fructose is the most commonly used ketone sugar.
4. Unlike aldehyde sugars, fructose has a carbon 2 atom (a ketone).
5. It is an isomer of glucose that is formed through the isomerization of glucose.
6. Fructose is usually combined with glucose to produce the disaccharide sucrose (common table sugar).
7. This sugar, a ketohexose with a characteristic polarized light rotation of -92.4°, is also known as levulose because of its important lavatory properties.
8. It can be found as a free compound in honey, plant tissues, and ripe fruits.
9. When fructose and glucose are linked together, saccharose or sugarcane is formed.

Diagram:

Aldose: $\mathrm{CN}\left({\mathrm{H}}_2\mathrm{O}\right)\mathrm{N}$ is the specific chemical formula for an aldose.

1. A monosaccharide with an aldehyde group attached to the carbon skeleton is called an aldose.
2. They are mostly present in plants.
3. Carbohydrates containing an aldehyde group are called aldoses.

Hence, Fructose is not an Aldose.