Single Choice

During acetylation of glucose it needs $$x$$ moles of acetic anhydride. The value of $$x$$ would be:

A$$3$$
B$$5$$
Correct Answer
C$$4$$
D$$1$$

Solution

Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five $$-OH$$ groups. $$Glucose + 5 \; {H}_{3}C-\overset{\underset{||}{O}}{C}-O-\overset{\underset{||}{O}}{C}-C{H}_{3} \xrightarrow{Acetylation} CHO-{(CH-O-\overset{\underset{||}{O}}{C}-C{H}_{3})}_{4}-(C{H}_{2}-O-\overset{\underset{||}{O}}{C}-C{H}_{3})$$

SIMILAR QUESTIONS

Biomolecules

Which of the following compounds will behave as a reducing sugar in an aqueous $$KOH$$ solution?

Biomolecules

Glucose on reaction with $$Br_2$$ water gives :

Biomolecules

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of :

Biomolecules

Which of the following statements is not true about glucose?

Biomolecules

$$Glucose \xrightarrow [ ]{ HCN } X\xrightarrow [ ]{ Hydrolysis } Y\xrightarrow [ Heat ]{ HI } Z$$ Identify $$Z$$.

Biomolecules

On oxidation with a mild oxidising agent like $${Br}_{2}/{H}_{2}O$$, the glucose is oxidised to?

Biomolecules

A diabetic person carries a packet of glucose with him always, because ?

Biomolecules

Write such facts which cannot be explained by the open chain structure of glucose.

Biomolecules

Which of the following Carbohydrates is used silvering of mirors

Biomolecules

When glucose is reacted with bromine water, the major product is

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