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Disaccharides are carbohydrates those contain two monosaccharides molecules, each in the hemiacetal form, joined together by the elimination of a water between two hydroxyl groups. Dehydration involves the anomeric carbon of one monosaccharide and may or may not involve the anomeric carbon of the other monosaccharide when the hemiacetal hydroxyl group on an anomeric carbon is involved in a dehydration, the resulting product is an acetal (in common) and glycoside (in carbohydrate).

Sucrose is a non-reducing sugar (while its hydrolysis products glucose and fructose are reducing sugars) because :

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Important Questions on Biomolecules

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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Sucrose contains glucose and fructose linked by :
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.
Reason (R): Sucrose involves glycosidic linkage between C1 of β-glucose and C2 of α-fructose.
Choose the most appropriate answer from the options given below :
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates

Sucrose is not:

MEDIUM
Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Write Haworth structure of "Lactose".
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
The reaction of concentrated sulphuric acid with carbohydrates C12H22O11 is an example of
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
What is invert sugar? Why is it so called?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates

Write the products obtained after hydrolysis of lactose.

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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
What are the expected products of hydrolysis of Lactose?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Which of the following will not produce an aldehyde group at the anomeric carbon in solution?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
 All monosaccharides__________ Tollens' reagent.
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Give one exampe of oligosacchardies.
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Maltose on treatment with dilute HCl gives:
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Write the names of two oligosaccharides.
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
What are the products obtained on hydrolysis of sucrose?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
What are tetrasaccharides? Give its general formula and an example
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Define Oligosaccharide?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Show that sucrose is a disaccharide.
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Which of the following sugars is a reducing disaccharide?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
Which one of the following statement is not true?
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Chemistry>Organic Chemistry>Biomolecules>Carbohydrates
For 'invert sugar', the correct statement(s) is (are)

(Given: specific rotations of +-sucrose, +-maltose, L---glucose and L-+-fructose in aqueous solution are + 66°, +140°, –52° and + 92°, respectively)