Advertisements
Advertisements
Questions
Write a commercial method for preparation of glucose.
How is glucose prepared on a commercial scale?
Advertisements
Solution
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.
\[\ce{\underset{\text{Starch}}{(C6H10O5)}_{{n}} + {n}H2O ->[H+][393K, 2-3 atm] \underset{\text{Glucose}}{{n}C6H12O6}}\]
APPEARS IN
RELATED QUESTIONS
Give two evidences for presence of formyl group in glucose.
Draw a neat diagram for the following:
Haworth formula of maltose
Glucose on oxidation with dilute nitric acid gives _______________
Explain the preparation of glucose from sucrose.
Classify the following carbohydrates into monosaccharide, disaccharide, oligosaccharide and polysaccharide:
glucose, cellulose, maltose, stachyose
Explain D and L configuration in sugars.
What is monosaccharide?
By which of the following process formation of glycosidic bond occurs?
Identify the bond that links the carbon of two adjacent monosaccharides.
Identify the given structure 'P' and 'Q'.
Which of the following carbohydrate is sweet to taste?
From the following identify the group that is exclusively consists of polysaccharides.
Identify the WRONG statement.
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 ______.
From the following identify the two types of glucose polymers present in starch.
Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?
Which of the following monosaccharide is a ketohexose?
Which element among the following is not present in saccharine?
Which one of the following is generally applicable to polysaccharides?
Which one of the following is Tetrose sugar?
Which one of the following carbohydrates is insoluble in water?
Which of the following statements is NOT true for glyceraldehyde?
Which among the following statements is true for amylose?
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 of the following statement is NOT true about saccharic acid?
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.
\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]
How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?
Which among the following is a product of hydrolysis of one mole raffinose?
Which among the following observations suggests that glucose also exists in cyclic form?
\[\ce{Glucose ->[(HCN)] Product ->[(hydrolysis)] Product ->[(HI + Heat)] A}\], the compound A is:
Why carbohydrates are generally optically active?
Which of the following groups contain polysaccharides?
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?
Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.
Formation of gluconic acid from glucose by oxidation using Br2 water.
Write Fischer projection formulae for glucose.
Explain the hydrolysis of sucrose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active.
The sugar found in milk is ______.
