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प्रश्न
How is glucose prepared from cane sugar (sucrose)?
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उत्तर १
Cane sugar (sucrose) is boiled with dilute hydrochloric acid or sulphuric acid. Cane sugar is hydrolysed into an equimolar mixture of glucose and fructose.
उत्तर २
\[\ce{\underset{\text{Sucrose}}{C12H22O11} + H2O ->[H+][\Delta] \underset{\text{glucose}}{C6H12O6} + \underset{\text{fructose}}{C6H12O6}}\]
Warming with diluted sulphuric or hydrochloric acid for approximately two hours hydrolyses sucrose. Through this hydrolysis, sucrose is converted into a combination of glucose and fructose.
Ethanol is added during cooling to separate glucose from fructose. Since glucose is nearly insoluble in alcohol, it crystallises first. To obtain glucose crystals, the solution is filtered.
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