Question

Ketones do not reduce Tollen’s reagents, but fructose with a keto group reduces it. It is attributed to

• A. Enolisation of keto group of fructose and then, its transformation into aldehyde group in presence of OH¯ which is present in Tollen’s reagent
• B. > CHOH group which is also oxidised to keto group
• C. Both statements are correct
• D. None of the statement is correct

Answer 1

Answer: (A)

Enolisation of keto group of fructose and then, its transformation into aldehyde group in presence of OH¯ which is present in Tollen’s reagent

Answer 2

Fructose on enolisation remains in the equilibrium with mannose and glucose hence reduces tollens reagent.

Fructose Mannose Glucose