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प्रश्न
How is glucose prepared from starch?
Write the preparation of glucose from starch.
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उत्तर
Commercially, glucose is obtained on a large scale by hydrolysis of starch, which is heated to 393 K under pressure with dilute sulphuric acid.
\[\ce{\underset{Starch}{(C6H10O5)_n}+ nH2O ->[dil H2SO4][393 K, 2-3 atm] \underset{Glucose}{nC6H12O6}}\]
Excess sulphuric acid is neutralized by adding chalk powder. Activated charcoal is used to remove coloured impurities. The solution is cooled, resulting in the separation of glucose crystals, which are filtered and removed.
संबंधित प्रश्न
Describe laboratory method for preparation of glucose.
What is the action of following reagents on glucose?
bromine water
What is the action of following reagents on glucose?
hydroxyl amine
Stachyose is an example of _______.
(A) monosaccharides
(B) disaccharides
(C) trisaccharides
(D) tetrasaccharides
A 10% solution (by mass) of sucrose in water has freezing point of 269.15 K. Calculate the freezing point of 10% glucose in water, if freezing point of pure water is 273.15 K.
(Given: Molar mass of sucrose = 342 g mol−1, Molar mass of glucose = 180 g mol−1)
How is glucose prepared from cane sugar (sucrose)?
Write the formula of the complex copper (II) hexacyanoferrate (II).
How is glucose prepared by commercial method? How is peptide linkage formed?
How is glucose prepared by commercial method? How is peptide linkage formed?
Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives ______.
Which of the following statements is not true about glucose?
In nucleoside a base is attached at 1′ position of sugar moiety. Nucleotide is formed by linking of phosphoric acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide?
Which sugar is called invert sugar? Why is it called so?
During curdling of milk, what happens to sugar present in it?
How do you explain the presence of five – OH groups in glucose molecule?
How do you explain the presence of an aldehydic group in a glucose molecule?
The α-D glucose and β-D glucose differ from each other due to difference in carbon atom with respect to its
In the acetylation of glucose, which group is involved in the reaction
Which of the following is an example of aldo hexose?
A nucleoside is made of:-
Which of the following base is not present in RNA?
A nucleoside acids, the sequence is
Amylopectin is a polymer of:-
Which of the following statements is not true about glucose?
