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प्रश्न
What is the action of the following reagents on glucose?
acetic anhydride
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उत्तर
Glucose reacts with acetic anhydride to form glucose pentaacetate.
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संबंधित प्रश्न
Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Draw a neat diagram for the following:
Haworth formula of maltose
Explain the preparation of glucose from sucrose.
Write chemical reaction for following conversions
glucose into glucoxime
Write a chemical reaction to convert glucose into glucose cyanohydrin.
Identify the given structure 'P' and 'Q'.
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?
From the following identify the group that is exclusively consists of polysaccharides.
From the following which is a heteropolysaccharide?
By which of the following feature we can identify the relatively small DNA molecules of plasmids?
Identify a non-reducing carbohydrate from the following.
Chitin is a/an ______.
Monosaccharides are ______ in nature.
Identify the CORRECT combination.
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?
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Which element among the following is not present in saccharine?
Stachyose is ____________.
Which one of the following is a carbohydrate but does NOT follow the general formula of carbohydrate?
Which one of the following is NOT soluble in water?
Which of the following statements is NOT true for glyceraldehyde?
Which following reagent is used to detect presence of five hydroxyl groups in a glucose molecule?
Which among the following reagents is used to confirm the presence of carbonyl group in glucose?
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)
Which among the following reagents is used to obtain gluconic acid from glucose?
Identify the product Y in the following reaction.
\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]
Which among the following is a product of hydrolysis of one mole raffinose?
What is the product obtained when Br2 water reacts with glucose?
How many hydroxyl groups are present in Erythrulose?
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?
Assertion: A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of little hydrochloric acid, it becomes levorotatory.
Reason: Sucrose hydrolysis gives equal amounts of glucose and fructose. As a result of this change in sign of rotation is observed.
The number of sp2 and sp3 hybridised carbon in fructose are respectively ____________.
Complete hydrolysis of cellulose gives ____________.
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Maltose
Is the following sugar, D-sugar or L-sugar?
Lactose is made of ______.
Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence of ______.
A molecule of stachyose contains how many carbon atoms?
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 ______.
Starch and cellulose are compounds made up of many units of ______.
Consider the following reaction
\[\ce{A <-[Br2 - H2O] Glucose ->[HNO3] B}\]
Here, 'A' and 'B' are respectively.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active?
Describe the action of the following reagent on glucose:
Bromine water
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active.
Two monosaccharides are held together by ______ bond.
