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What happens when D-glucose is treated with the following reagent? HI - Chemistry

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प्रश्न

What happens when D-glucose is treated with the following reagent?

HI

टिप्पणी लिखिए

उत्तर

When D-glucose is heated with HI for a long time, n-hexane is formed.

\[\begin{array}{cc}
\ce{CHO}\phantom{...............................................}\\
|\phantom{..................................................}\\
\ce{(CHOH)4 ->[HI][\Delta] \underset{{n}-hexane}{CH3 - CH2 - CH2 - CH2 - CH2 - CH3}}\\
|\phantom{..................................................}\\
\ce{\underset{{D-glucose}}{CH2OH}}\phantom{..........................................}
\end{array}\]

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अध्याय 14: Biomolecules - Exercises [पृष्ठ ४२३]

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एनसीईआरटी Chemistry [English] Class 12
अध्याय 14 Biomolecules
Exercises | Q 9.1 | पृष्ठ ४२३

संबंधित प्रश्न

Draw the simple Fisher projection formulae of D - (+) - glucose and D - (-) - fructose


Maltose is a 

(a) Polysaccharide

(b) Disaccharide

(c) Trisaccharide

(d) Monosaccharide


Enlist the properties of glucose that can not be explained on the basis of open chain structure of it


What happens when glucose is treated with hydrogen cyanide?


Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?

 

 

Differentiable between the following: 
Amylose and Amylopectin 


What do you observe when glucose solution is heated with Tollen’s reagent?


Fill in the blanks by choosing the appropriate word/words from those given in the brackets:  

(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)

Sucrose is a _________ and yields upon hydrolysis, a mixture of ________ and fructose.


What do you observe when glucose is treated with bromine water?


Which one of the following compounds is different from the rest?


Reduction of glucose by HI suggest that ____________.


The reaction of glucose with red P + HI is called ____________.


Which of the following reactions of glucose can be explained only by its cyclic structure?


The number of chiral carbons in ß-D(+) glucose is ____________.


Which one of the following reactions is not explained by the open chain Structure of glucose?


Write the reactions of D-glucose which can’t be explained by its open-chain structure. How can cyclic structure of glucose explain these reactions?


Consider the following reactions:

(i) \[\ce{Glucose + R-OH ->[Conc. HNO3] [A] ->[X eq of][(CH3CO)2O] Acetyl derivative}\]

(ii) \[\ce{Glucose ->[Ni/H2] [A] ->[Y eq of][(CH3CO)2O] Acetyl derivative}\]

(iii) \[\ce{Glucose ->[Z eq of][(CH3CO)2O] Acetyl derivative}\]

'X, 'Y' and 'Z' in these reactions are respectively:


Glucose with excess of phenyl hydrazine forms ______.


The number of asymmetric carbon atoms in the glucose molecule in open and cyclic form is ______.


Give a reason for the following observations:

Penta-acetate of glucose does not react with hydroxylamine.


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