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प्रश्न
What are reducing and non-reducing sugars?
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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
Write the name of the polysaccharide used for the commercial preparation of glucose.
Write the name of the unit to which glucose unit is linked to from sucrose.
What is the action of the following reagents on glucose?
hydroxylamine
Define carbohydrates.
What is monosaccharide?
Identify the bond that links the carbon of two adjacent monosaccharides.
Identify the substances having glycosidic bond and peptide bond, respectively in their structure:
Which of the following is the basic unit of carbohydrates?
Formation of lactose by conden ation results in the release of how many molecules of water?
Carbohydrates can contain which of the following chemical groups?
Identify the WRONG statement.
By which of the following feature we can identify the relatively small DNA molecules of plasmids?
Identify a non-reducing carbohydrate from the following.
Which is the product obtained, when Br2 water reacts with glucose?
Match the Column I and Column II select the correct option.
| Column I | Column II | ||
| i. | Monosaccharides | a. | Stored energy in animals |
| ii. | Glycogen | b. | Polymer made from ß-glucose molecules |
| iii. | Cellulose | c. | Exoskeleton of arthropods |
| iv. | Chitin | d. | Building blocks of carbohydrates |
| e. | Plant hormone |
Chitin is a/an ______.
____________ do not give smaller sugar units on hydrolysis.
Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?
Raffinose, sucrose and stachyose are respectively ____________.
Prolonged heating of glucose with hot HI results in the formation of ____________.
All these carbohydrates contain \[\ce{1 -> 4β}\] glycosidic linkage, EXCEPT ____________.
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The general formula for polysaccharide is ____________.
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Which of the following molecules reduces Fehling's solution?
Which following reagent is used to detect presence of five hydroxyl groups in a glucose molecule?
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
Which among the following reagents is used to confirm the presence of carbonyl group in glucose?
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(Molar mass of sucrose = 342 g mol−1)
Which among the following reagents is used for conversion of glucose to glucoxime?
What is the molecular formula of glyceraldehyde?
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\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]
What is the product obtained when Br2 water reacts with glucose?
Which among the following observations suggests that glucose also exists in cyclic form?
How many optical isomers are possible for a compound having four asymmetric carbon atoms?
Which one of the following rotates the plane polarized light towards left?
The correct corresponding order of names of four aldoses with configuration given below Respectively is:
Complete hydrolysis of cellulose gives ____________.
Glucose is an aldose. Which one of the following reactions is not expected with glucose?
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Starch
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.
Lactose
Write the structure of α-D (+) glucopyranose.
Which of the following groups contain polysaccharides?
The molecule of glucose is also called ______.
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The glycosidic linkage present in maltose is ______.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Explain the hydrolysis of sucrose.
Write the ring structure of glucose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
The linkage present in Lactose is ______.
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active?
