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प्रश्न
What are reducing and non-reducing sugars?
उत्तर
1. Reducing sugars: Those carbohydrates which contain free aldehyde or ketonic group and reduces Fehling’s solution and Tollen’s reagent are called reducing sugars. All monosaccharides whether aldose or ketone are reducing sugars.
2. Non-reducing sugars: Carbohydrates that do not reduce Tollen’s reagent and Fehling’s solution are called non – reducing sugars. Example Sucrose. They do not have a free aldehyde group.
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संबंधित प्रश्न
Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Write chemical reaction for following conversions
glucose into glucoxime
Classify the following carbohydrates into monosaccharide, disaccharide, oligosaccharide and polysaccharide:
glucose, cellulose, maltose, stachyose
Explain the classification of carbohydrates with examples.
Draw the structure of the pyran.
By which of the following process formation of glycosidic bond occurs?
Which enzymes would work sequentially on potatoes consumed by an individual?
Which of the following carbohydrate is sweet to taste?
From the following which is a heteropolysaccharide?
The reserve food material in animals is ____________.
Fructose is the fruit sugar and chemically it is ketohexose but it has a ______ rather than a ______.
From the following identify the materials that are made up of cellulose.
i. Plant cell wall
ii. Exoskeleton of arthropods
iii. Paper from plant pulp
iv. Cotton fibre
Identify the WRONG statement.
Identify a non-reducing carbohydrate from the following.
The number of asymmetric carbon atoms in the glucose molecule is ____________.
Which among the following type of linkages is present in cellulose?
Stachyose is ____________.
\[\ce{CH3 - CH2 - CH2 - Br ->[Na][dry ether] A ->[Cl2] B}\]
Identify the product B in the above reaction.
Which among the following statements is true for amylose?
Identify the number of secondary carbon atoms in glucose.
On hydrolysis sucrose gives ____________.
What is the quantity of glucose obtained when 68.4 g of sucrose is hydrolyzed in laboratory under ideal condition?
(Molar mass of sucrose = 342 g mol−1)
When one mole of lactose is hydrolysed, the hydrolysate contains ____________.
Which among the following observations suggests that glucose also exists in cyclic form?
Which one given below is a non-reducing sugar?
The number of sp2 and sp3 hybridised carbon in fructose are respectively ____________.
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Fructose
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Sucrose
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Maltose
Match the Column I with Column II and choose the correct answer from options below:
| Column I | Column II |
| A. Purine | 1. Glycogen |
| B. Pyrimidine | 2. Cellulose |
| C. Structural polysaccharide | 3. Glucagon |
| D. Storage polysaccharide | 4. Adenine |
| 5. Cytosine |
Corn is immersed in boiling water. It is then cooled, and the solution becomes sweet. It is due to ______.
Why carbohydrates are generally optically active.
Describe the action of the following reagent on glucose:
dil. Nitric acid.
Write the Zwitter ion structure of alanine.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
