Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

Options

A. 1:1 D-(+)-glucose, D-(-)-fructose
B. 1:2 D-(+)-glucose, D-(-)-fructose
C. 1:1 D-(-)-glucose, D-(+)-tructose
D. 1:2 D-(-)-glucose, D-(+)-fructose

Answer

A

Explanation

On hydrolysis with dilute aqueous sulphuric acid, sucrose gives a equimolar mixture of D-(+)-glucose and D-(-)-fructose.
`C_(12)underset"Sucrose"(H_(22))O_(11)+ H_(2)Ooverset(H_(2)SO_(4))rarrunderset"D-(+)-glucose"C_(6)H_(12)O_(6) + underset"D-(-)-fructose"C_(6)H_(12)O_(6)`
Sucrose is dexlrorotatory but after hydrolysis , it gives dextrorotatory glucose and laevorotatory fructose. Laevorotatory fructose is more, so the mixture is laevorotatory.