Q. Fructose reduces Tollens' reagent due to
A) Asymmetric carbons
B) Primary alcoholic group
C) Secondary alcoholic group
D) Enolisation of fructose followed by conversion to aldehyde by base
Explanation
[Solution from source] Fructose is a ketose, but in alkaline Tollens' reagent it undergoes enolisation (via an enediol) and isomerises to aldoses, which are then oxidised. The alcoholic groups or asymmetric carbons do not reduce Tollens' reagent. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.