MHT CET 2023 Chemistry question

What is the value of specific rotation exhibited by fructose molecule?

(A)+52.7
(B)-92.4Correct
(C)+66.5
(D)-40.3

Answer: (B)

Solution

D-Fructose is laevorotatory: the equilibrium (mutarotated) specific rotation of D-(-)-fructose is (this is why it is called laevulose), whereas D-glucose is dextrorotatory

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Question ID VK-097435