Question

The general molecular formula for disaccharide is:

• A. $C_{12}{H}_{22}{O}_{11}$
• B. $C_{10}{H}_{20}{O}_{10}$
• C. $C_{12}{H}_{20}{O}_{10}$
• D. $C_{12}{H}_{22}{O}_{10}$

Answer 1

The correct option is A $C_{12}{H}_{22}{O}_{11}$

A disaccharide is a sugar (a carbohydrate) composed of two monosaccharides. It is formed when two sugars are joined together and a molecule of water is removed.

$C_{12}{H}_{22}{O}_{11}$ is sucrose on hydrolysis gives

$C_{12}{H}_{22}{O}_{11}+H_{2}O⟶C_6{H}_{12}{O}_6+C_6{H}_{12}{O}_6$ gives glucose and fructose.

All others cannot hydrolyse in water making them monosaccharides.