Fructose has a specific rotation of (-92.4°). An aqueous solution of fructose has an observed angle of rotation of (-27.7°) when placed in a polarimeter tube 10 cm long. How much amount of fructose is

Question

Fructose has a specific rotation of (-92.4°). An aqueous solution of fructose has an observed angle of rotation of (-27.7°) when placed in a polarimeter tube 10 cm long. How much amount of fructose is dissolved in 100 ml of aqueous solution?

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. keto acids,  gem-dioic acids and , unsaturated  acids decarboxylates on simple heating. (D) is however a keto acid  but in transition state, there will be a double bond at bridge head position which is not stable. So, (D) will not decarboxylate on heating.

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