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Write a chemical reaction to convert glucose into glucose cyanohydrin. - Chemistry

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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:

\[\begin{array}{cc}
\phantom{...........}\ce{CN}\\
\phantom{.........}|\\
\phantom{}\ce{CHO}\phantom{..........}\ce{CHOH}\phantom{..}\\
\phantom{}|\phantom{...............}|\phantom{.......}\\
\phantom{}\ce{(CHOH)4 ->[HCN] (CHOH)4}\phantom{}\\
\phantom{}|\phantom{...............}|\phantom{.......}\\
\phantom{..........}\ce{\underset{\text{Glucose}}{CH2OH} \phantom{....}\underset{\text{Glucose cyanohydrin}}{CH2OH}}\phantom{........}
\end{array}\]

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अध्याय 14: Biomolecules - Short Answer Questions (Type-II)

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संबंधित प्रश्न

Give two evidences for presence of formyl group in glucose.


Draw a neat diagram for the following:

Haworth formula of glucopyranose.


Glucose on oxidation with dilute nitric acid gives _______________


The glycosidic linkage in maltose is formed between _______________


Draw the structure of α-D glucopyranose.


What is the action of the following reagents on glucose?

acetic anhydride


Explain D and L configuration in sugars.


Draw the structure of the pyran.


By which of the following process formation of glycosidic bond occurs?


Identify the bond that links the carbon of two adjacent monosaccharides.


Identify the substances having glycosidic bond and peptide bond, respectively in their structure:


Which enzymes would work sequentially on potatoes consumed by an individual?


Which of the following monosaccharides is a tetrose sugar?


Which of the following is the basic unit of carbohydrates?


Identify a non-reducing carbohydrate from the following.


Which reagent among the following is used to confirm presence of aldehydic carbonyl group in glucose?


Prolonged heating of glucose with hot HI results in the formation of ____________.


4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.


Identify the INCORRECT statement regarding glucose.


Which one of the following is an oligosaccharide?


Which one of the following carbohydrates is insoluble in water?


Which one of the following is NOT soluble in water?


Which following reagent is used to detect presence of five hydroxyl groups in a glucose molecule?


Which among the following statements is true for amylose?


How many moles of fructose and galactose respectively are obtained on hydrolysis of 1 mole stachyose?


When 2 moles of stachyose is hydrolyzed, the number of moles of galactose obtained is ____________.


Which among the following sugars does not reduce Tollen's reagent?


What is the molecular formula of glyceraldehyde?


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\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]


How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?


What is the product obtained when Br2 water reacts with glucose?


When one mole of lactose is hydrolysed, the hydrolysate contains ____________.


How many hydroxyl groups are present in Erythrulose?


Which among the following observations suggests that glucose also exists in cyclic form?


Assertion: A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of little hydrochloric acid, it becomes levorotatory.

Reason: Sucrose hydrolysis gives equal amounts of glucose and fructose. As a result of this change in sign of rotation is observed.


Complete hydrolysis of cellulose gives ____________.


α-D (+) Glucose and β-D (+) glucose are ____________.


Classify the following into monosaccharides, oligosaccharides and polysaccharides.

Lactose


Classify the following into monosaccharides, oligosaccharides and polysaccharides.

Maltose


Which of the following groups contain polysaccharides?


If 'n' represents total number of asymmetric carbon atoms in a compound, then the possible· number of optical isomers of the compound is ______.


Lactose is made of ______.


Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.


Starch and cellulose are compounds made up of many units of ______.


Formation of gluconic acid from glucose by oxidation using Br2 water.


The glycosidic linkage present in maltose is ______.


Why carbohydrates are generally optically active.


Assign D/L configuration to the following monosaccharides:


Write Fischer projection formulae for glucose.


Explain the hydrolysis of sucrose.


CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.


CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.


Why carbohydrates are generally optically active?


\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.


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