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Glucose on Fehling’s test gives ______

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in Chemistry – Class 12 by (188k points)
Glucose on Fehling’s test gives ______

(a) no reaction

(b) silver mirror

(c) red precipitate

(d) pungent gas

The question was posed to me during an interview.

I want to ask this question from Biomolecules Carbohydrates topic in section Biomolecules of Chemistry – Class 12

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The correct option is (c) red precipitate

Easy explanation: Since glucose is readily oxidised, it acts as a strong reducing agent and reduces Fehling’s reagent to form a carboxylate compound (in the place of CHO group which gets oxidised) along with a red precipitate of Cu2O.

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