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Question
Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a __________.
Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a __________.
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Solution
The correct option is D non-reducing sugar
Structure of sucrose is shown below
On hydrolysis of sucrose, we get an equimolar mixture of α−D−(+)−Glucose and β−D−(−)−Fructose. So, we get two moles of monosaccharide upon hydrolysis of one mole sucrose. Hence, it is a disaccharide.
Since the reducing groups of glucose and fructose are involved in glycosidic bond formation in sucrose.
Hence, it is a non-reducing sugar.
Hence, the correct answers are (B) and (D).
Structure of sucrose is shown below
On hydrolysis of sucrose, we get an equimolar mixture of α−D−(+)−Glucose and β−D−(−)−Fructose. So, we get two moles of monosaccharide upon hydrolysis of one mole sucrose. Hence, it is a disaccharide.
Since the reducing groups of glucose and fructose are involved in glycosidic bond formation in sucrose.
Hence, it is a non-reducing sugar.
Hence, the correct answers are (B) and (D).
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