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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.
\[\ce{\underset{\text{Starch}}{(C6H10O5)n}+ nH2O ->[dil H2SO4][393k-2-3 atm] \underset{\text{Glucose}}{nC6H12O6}}\]
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)
How is glucose prepared from cane sugar (sucrose)?
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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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Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a:
(i) monosaccharide
(ii) disaccharide
(iii) reducing sugar
(iv) non-reducing sugar
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?
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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
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Among the naturally occuring carbohydrates, furanose ring is found in the:
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How is glucose prepared on commercial scale?
