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प्रश्न
Draw the structure of the pyran.
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उत्तर
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संबंधित प्रश्न
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Give two evidences for presence of formyl group in glucose.
The glycosidic linkage in maltose is formed between _______________
Write the name of the polysaccharide used for the commercial preparation of glucose.
Explain the preparation of glucose from sucrose.
What is the action of the following reagents on glucose?
hydrogen iodide
Define carbohydrates.
Write a chemical reaction to convert glucose into glucose cyanohydrin.
Write a commercial method for preparation of glucose.
Which of the following type of carbohydrates cannot be hydrolyzed?
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?
From the following which is a heteropolysaccharide?
______ is the prosthetic group of glycoproteins.
The reserve food material in animals is ____________.
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
____________ do not give smaller sugar units on hydrolysis.
From the following identify the two types of glucose polymers present in starch.
Match the columns and select the correct option.
| Column I | Column II | ||
| i. | Starch | a. | Animal storage molecule |
| ii. | Cellulose | b. | Plant storage molecule |
| iii. | Glycogen | c. | Heparin |
| iv. | Heteropolysaccharide | d. | Plant cell wall component |
Which carbon atoms of α- D glucopyranose and β-D-fructofuranose respectively are linked together to form glycosidic linkage in sucrose?
Which among the following type of linkages is present in cellulose?
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Which element among the following is not present in saccharine?
The general formula for polysaccharide is ____________.
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
What is the number of hydroxyl groups present in lactic acid?
Identify the number of secondary carbon atoms in glucose.
Which among the following reagents is used to confirm the presence of carbonyl group in glucose?
Which among the following sugars does not reduce Tollen's reagent?
Which among the following reagents is used to obtain gluconic acid from glucose?
What is the product obtained when Br2 water reacts with glucose?
Which one of the following rotates the plane polarized light towards left?
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Maltose
Which of the following groups contain polysaccharides?
The molecule of glucose is also called ______.
If 'n' represents total number of asymmetric carbon atoms in a compound, then the possible· number of optical isomers of the compound is ______.
A molecule of stachyose contains how many carbon atoms?
Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.
Corn is immersed in boiling water. It is then cooled, and the solution becomes sweet. It is due to ______.
Starch and cellulose are compounds made up of many units of ______.
Which one is a non-reducing commercial sugar?
Formation of gluconic acid from glucose by oxidation using Br2 water.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
Assign D/L configuration to the following monosaccharides:
Describe the action of the following reagent on glucose:
Bromine water
Describe the action of the following reagent on glucose:
dil. Nitric acid.
Write the ring structure of glucose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active.
Write the Zwitter ion structure of alanine.
Why carbohydrates are generally optically active.
