Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Fructose reduces Fehlings solution and Tollens reagent. Reaction: Fructose does not contain any aldehydic group.A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C) If Assertion is true but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: B
Solution :
Fructose on warming with dilute alkali gives rise an equilibrium mixture of glucose, fructose and mannose. The ability of fructose to reduce Fehlings solution and Tollens reagent is probably due to isomerization of fructose to glucose and mannose. This is called lobry de Bruyn and Bikenstein rearrangement.
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