Benedict's Test for Glucose
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Glucose is heated with Benedict's reagent to form a brick red precipitate.

Benedict's Test for Sucrose
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Sucrose is heated with Benedict's reagent with no visible reaction.

Benedict's Test for Fructose
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Fructose is heated with Benedict's reagent to form a red precipitate.

Clinitest Tablet is Added to Glucose
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A Clinitest tablet (anhydrous Benedict's reagent) is added to a solution of glucose producing a precipitate of brick-red Cu2O.

Clinistrip Test of Glucose is Demonstrated
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A Clinistrip for measures levels of glucose in urine.

Discussion
Glucose is heated with Benedict's reagent (CuSO₄, NaOH, and tartaric acid) to form a brick red precipitate. Sucrose does not react under these conditions. Fructose does form a red precipitate with Benedict's reagent.

Carbohydrates that contain aldehydes or a-hydroxymethyl ketones can be oxidized by Cu(II) ion and are classified as reducing sugars. They reduce the Cu(II) ion to Cu(I).