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Q.

Sucrose in water is dextro-rotatory, [α]D=+66.4°. When boiled with dilute HCl, the solution becomes laevo-rotatory, [α]D=-20°. In this process, the sucrose molecule breaks into

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a

D-glucose +L-fructose

b

L-glucose +L-fructose

c

D-glucose +D-fructose

d

L-glucose +D-fructose

answer is C.

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Detailed Solution

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.

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