Question

Hydrolysis of starch produces:

• A. Glucose
• B. Fructose
• C. Both (1) and (2)
• D. Sucrose

Answer 1

The correct option is A Glucose

Starch is a ploymeric carbohydrate made up of large number of glucose unit held by glycosidic bond.
Glucose is produced commercially by the hydrolysis of starch i.e. by boiling it with dil. $H_{2}S{O}_4$ at 393 K under pressure of 2-3 bar.
$\underset{\text{starch}}{(C_6{H}_{10}{O}_5{)}_n}+n{H}_{2}O\underset{393\text{K},2-3\text{bar}}{\overset{H^{+}}{\to }}\underset{\text{Glucose}}{n{C}_6{H}_{12}{O}_6}$