Assertion (A) : Fructose is a reducing sugar.
Reason (R) : Fructose does not reduce Fehling solution and Tollen’s reagent.
Ans. Let’s analyze the given Assertion (A) and Reason (R):
Assertion (A): Fructose is a reducing sugar.
Reason (R): Fructose does not reduce Fehling solution and Tollens’ reagent.
Now, let’s evaluate:
-
Assertion (A) is true. Fructose is a reducing sugar because it has a free ketone or aldehyde group that can undergo oxidation, thus reducing other substances.
-
Reason (R) is incorrect. Fructose does reduce Fehling solution and Tollens’ reagent. Fructose, being a reducing sugar, can react with Fehling solution (containing copper ions) and Tollens’ reagent (containing silver ions) to reduce them. In these reactions, the aldehyde or ketone group in fructose gets oxidized while the copper ions in Fehling solution or silver ions in Tollens’ reagent get reduced, resulting in the formation of a red precipitate of copper(I) oxide in Fehling solution and a silver mirror in Tollens’ reagent.
