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Question


On acid hydrolysis of above disaccharide, we get:

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

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.


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