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JEE Main Chemistry question

ChemistryBiomoleculesJEE Main

At a certain temperature, sucrose hydrolyses to give 55% D-glucose and 45% D-fructose. The specific rotation of D-glucose is and that of D-fructose is . Before hydrolysis, the specific rotation of sucrose was . What is the change in specific rotation of sucrose after hydrolysis? (Report your answer to the closest integer.)

Answer: 79

Solution

The specific rotation of the hydrolysis mixture is the weighted average: $ = =

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Question ID VK-151237