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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
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)
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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?
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Which of the following statements is not true about glucose?
Under what conditions glucose is converted to gluconic and saccharic acid?
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How do you explain the presence of an aldehydic group in a glucose molecule?
A nucleoside is made of:-
Amylopectin is a polymer of:-
Among the naturally occuring carbohydrates, furanose ring is found in the:
How is glucose prepared on commercial scale?
