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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
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)
Write the formula of the complex copper (II) hexacyanoferrate (II).
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How is glucose prepared by commercial method? How is peptide linkage formed?
How is glucose prepared by commercial method? How is peptide linkage formed?
Hydrolysis of starch yields ____________.
Which among the following is the simplest sugar?
Which of the following statements is not true about glucose?
How do you explain the presence of all the six carbon atoms in glucose in a straight chain?
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?
Under what conditions glucose is converted to gluconic and saccharic acid?
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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?
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A nucleoside is made of:-
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When sucrose is heated with cone. HNO3 the product is ______.
