question_answer

Sucrose in water is dextro-rotatory, \[{{[\alpha ]}_{D}}=66.4{}^\circ .\]When boiled with dilute HCl, the solution becomes leavo-rotatory, \[{{[\alpha ]}_{D}}=-\,\,20{}^\circ .\] In this process the sucrose molecule breaks into

A) L-glucose + D-fructose

B) L-glucose + L-fructose

C) D-glucose + D-fructose

D) D-glucose + L-fructose

Correct Answer: C

Solution :

[c] The hydrolysis of sucrose by boiling with mineral acid or by enzyme invertase or sucrase produces a mixture of equal molecules of \[D(+)-\]glucose and \[D(-)-\]Fructose.