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प्रश्न
Write a chemical reaction to convert glucose into glucose cyanohydrin.
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उत्तर
Glucose forms cyanohydrin on reaction with hydrogen cyanide:
\[\begin{array}{cc}
\phantom{...........}\ce{CN}\\
\phantom{.........}|\\
\phantom{}\ce{CHO}\phantom{..........}\ce{CHOH}\phantom{..}\\
\phantom{}|\phantom{...............}|\phantom{.......}\\
\phantom{}\ce{(CHOH)4 ->[HCN] (CHOH)4}\phantom{}\\
\phantom{}|\phantom{...............}|\phantom{.......}\\
\phantom{..........}\ce{\underset{\text{Glucose}}{CH2OH} \phantom{....}\underset{\text{Glucose cyanohydrin}}{CH2OH}}\phantom{........}
\end{array}\]
संबंधित प्रश्न
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Draw a neat diagram for the following:
Haworth formula of glucopyranose.
Classify the following carbohydrates into monosaccharide, disaccharide, oligosaccharide and polysaccharide:
glucose, cellulose, maltose, stachyose
From the following identify an example of disaccharides.
Formation of lactose by conden ation results in the release of how many molecules of water?
From the following identify the group that is exclusively consists of polysaccharides.
Fructose is the fruit sugar and chemically it is ketohexose but it has a ______ rather than a ______.
Identify the WRONG statement.
____________ do not give smaller sugar units on hydrolysis.
Identify the CORRECT combination.
Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?
All these carbohydrates contain \[\ce{1 -> 4β}\] glycosidic linkage, EXCEPT ____________.
One mole of a carbohydrate on hydrolysis gives one mole of glucose and one mole of galactose. Identify the carbohydrate.
Identify the number of secondary carbon atoms in glucose.
Which among the following reagents is used to confirm the presence of carbonyl group in glucose?
Which of the following statement is NOT true about saccharic acid?
What is the quantity of glucose obtained when 68.4 g of sucrose is hydrolyzed in laboratory under ideal condition?
(Molar mass of sucrose = 342 g mol−1)
Which among the following reagents is used to obtain gluconic acid from glucose?
How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?
How many hydroxyl groups are present in Erythrulose?
The number of sp2 and sp3 hybridised carbon in fructose are respectively ____________.
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Starch
Write the structure of α-D (+) glucopyranose.
Formation of gluconic acid from glucose by oxidation using Br2 water.
Explain the hydrolysis of sucrose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why are carbohydrates generally optically active?
Why carbohydrates are generally optically active?
Why carbohydrates are generally optically active.
