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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?
dilute HNO3
Stachyose is an example of _______.
(A) monosaccharides
(B) disaccharides
(C) trisaccharides
(D) tetrasaccharides
How is glucose prepared from cane sugar (sucrose)?
Write the formula of the complex copper (II) hexacyanoferrate (II).
Which component of starch is a branched polymer of α-glucose and insoluble in water?
How is glucose prepared by commercial method? How is peptide linkage formed?
Hydrolysis of starch yields ____________.
Which among the following is the simplest sugar?
Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives ______.
Which of the following statements is not true about glucose?
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?
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?
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
Among the naturally occuring carbohydrates, furanose ring is found in the:
How is glucose prepared on commercial scale?
