Question

On acid hydrolysis of above disaccharide, we get:

• A. Two moles of glucose
• B. One mole of glucose
• C. One mole of galactose
• D. One mole of glucose and one mole of galactose

Answer 1

The correct option is D One mole of glucose and one mole of galactose

The given molecule is lactose. It is disaccharide, made of glucose and galactose linked by a 1,4-glycosidic linkage. So, upon hydrolysis of 1 mole lactose, the glycosidic linkage is cleaved and we get 1 mole of glucose and 1 mole of galactose.