Question

Assertion (A): Fructose is a reducing sugar.

Reason (R): Fructose does not reduce Fehling solution and Tollen’s reagent.

पर्याय

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Assertion (A) is true, but Reason (R) is false.

Explanation:

Carbohydrates with free aldehyde or ketone functional groups that can reduce other compounds are known as reducing sugars. Fructose is lowering sugar as a result. Since fructose is a ketose sugar and lacks a free aldehyde group in its cyclic form, its reaction with Fehling's solution is slower. However, fructose can undergo mutarotation to change into its open-chain form, which has a carbonyl group and can react with Fehling's solution when heated for an extended period of time and exposed to acidic circumstances. Tollen's Reagent is no different. The reason is, therefore, untrue.