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प्रश्न
Explain the preparation of glucose from sucrose.
Write chemical reaction for the preparation of glucose from sucrose.
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उत्तर
- Sucrose is hydrolysed by warming with dilute hydrochloric acid or sulfuric acid for about two hours.
- This hydrolysis converts sucrose into a mixture of glucose and fructose.
- Glucose is separated from fructose by adding ethanol during cooling.
- Glucose being almost insoluble in alcohol crystallizes out first. The solution is filtered to obtain crystals of glucose. The reaction can be given as,
\[\ce{\underset{Sucrose}{C12H22O11} + H2O ->[H+][\Delta] \underset{Glucose}{C6H12O6} + \underset{Fructose}{C6H12O6}}\]
संबंधित प्रश्न
Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Draw a neat diagram for the following:
Haworth formula of maltose
Which of the following monosaccharides is a tetrose sugar?
Carbohydrates can contain which of the following chemical groups?
Chitin is a/an ______.
Monosaccharides are ______ in nature.
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Identify the INCORRECT statement regarding glucose.
Which one of the following is a carbohydrate but does NOT follow the general formula of carbohydrate?
Which one of the following is Tetrose sugar?
Glucose and gluconic acid treated with dilute nitric acid forms saccharic acid. What does this indicate?
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?
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Maltose
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 ______.
Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?
Identify the product obtained in the following conversion.
\[\ce{Glucose ->[(O)][Br2 water] Product}\]
The glycosidic linkage present in maltose is ______.
Why carbohydrates are generally optically active?
Describe the action of the following reagent on glucose:
Bromine water
Why carbohydrates are generally optically active.
The linkage present in Lactose is ______.
Why carbohydrates are generally optically active.
\[\ce{CH2OH - CO - (CHOH)4 - CH2 OH}\] is an example of ______.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
