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Question
Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Solution
1) Sucrose (C12H22O11) is dextrorotatory (+66.5°). On hydrolysis with dilute acid or an enzyme called invertase, sucrose gives equimolar mixture of D-(+)-glucose and D-(–)-fructose.
\[\ce{\underset{\text{Sucrose}}{C12H22O11} + H2O ->[H+][\triangle]\underset{\text{D-(+)-Glucose}}{C6H12O6} + \underset{\text{D-(–)-Fructose}}{C6H12O6}}\]
2) Since the laevorotation of fructose (–92.4°) is larger than the dextrorotation of glucose (+52.7°), the hydrolysis product has net laevorotation.
Hence, hydrolysis of sucrose is also called inversion of sucrose.
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