write the preparation of glucose form.
(a)sucrose (b)strach.
Answers
Answer:
Glucose can be prepared in the laboratory by boiling sucrose (cane sugar) with dilute hydrochloric acid or sulphuric acid for about two hours. This hydrolyzes sucrose to glucose and fructose. In order to separate glucose from fructose, alcohol is added during cooling. Glucose is almost insoluble in alcohol.
Answer:
Glucose can be prepared in the laboratory by boiling sucrose (cane sugar) with dilute hydrochloric acid or sulphuric acid for about two hours. This hydrolyzes sucrose to glucose and fructose. In order to separate glucose from fructose, alcohol is added during cooling. Glucose is almost insoluble in alcohol.
Preparation of glucose from starch:
Commercially, glucose is obtained on a large scale by hydrolysis of starch, by boiling at 393 K with dilute sulphuric acid under pressure. ...
Excess sulphuric acid is neutralized by adding chalk powder.
Activated charcoal is used for the removal of coloured impurities.
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