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प्रश्न
Write a commercial method for preparation of glucose.
How is glucose prepared on a commercial scale?
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उत्तर
Commercial method for preparation of glucose: Commercially glucose is obtained by hydrolysis of starch by boiling it with dilute sulphuric acid at 393K under 2 to 3 atm pressure.
\[\ce{\underset{\text{Starch}}{(C6H10O5)}_{{n}} + {n}H2O ->[H+][393K, 2-3 atm] \underset{\text{Glucose}}{{n}C6H12O6}}\]
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संबंधित प्रश्न
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Write chemical reaction for following conversions
glucose into glucoxime
Write chemical reaction for following conversions
glucose into gluconic acid
What is the action of the following reagents on glucose?
hydrogen iodide
What is monosaccharide?
Draw the structure of the pyran.
From the following identify an example of disaccharides.
From the following identify the group that is exclusively consists of polysaccharides.
______ is the prosthetic group of glycoproteins.
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
Which among the following compounds is obtained when glucose reacts with hydrogen cyanide?
The number of asymmetric carbon atoms in the glucose molecule is ____________.
Monosaccharides are ______ in nature.
Identify the CORRECT combination.
Which among the following type of linkages is present in cellulose?
Raffinose, sucrose and stachyose are respectively ____________.
Prolonged heating of glucose with hot HI results in the formation of ____________.
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Which of the following statements is NOT true for glyceraldehyde?
Glucose and gluconic acid treated with dilute nitric acid forms saccharic acid. What does this indicate?
Which of the following molecules reduces Fehling's solution?
How many moles of fructose and galactose respectively are obtained on hydrolysis of 1 mole stachyose?
What is the number of hydroxyl groups present in lactic acid?
When 2 moles of stachyose is hydrolyzed, the number of moles of galactose obtained is ____________.
Which among the following sugars does not reduce Tollen's reagent?
Identify the number of oxygen atoms present in saccharic acid?
Which among the following reagents is used to obtain gluconic acid from glucose?
Identify the product Y in the following reaction.
\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]
What is the product obtained when Br2 water reacts with glucose?
How many hydroxyl groups are present in Erythrulose?
How many optical isomers are possible for a compound having four asymmetric carbon atoms?
The correct corresponding order of names of four aldoses with configuration given below Respectively is:
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.
Complete hydrolysis of cellulose gives ____________.
What are reducing and non-reducing sugars?
Why carbohydrates are generally optically active?
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Maltose
Lactose is made of ______.
A molecule of stachyose contains how many carbon atoms?
The two monosaccharides in a disaccharide are held together by ______ bonds.
Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.
Formation of gluconic acid from glucose by oxidation using Br2 water.
The glycosidic linkage present in maltose is ______.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
The linkage present in Lactose is ______.
Why are carbohydrates generally optically active?
Write the Zwitter ion structure of alanine.
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active.
\[\ce{CH2OH - CO - (CHOH)4 - CH2 OH}\] is an example of ______.
Why carbohydrates are generally optically active?
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
The sugar found in milk is ______.
