English

What is the action of the following reagents on glucose? hydrogen iodide - Chemistry

Advertisements
Advertisements

Question

What is the action of the following reagents on glucose?

hydrogen iodide

Short/Brief Note
Advertisements

Solution

Glucose gives n-hexane on prolonged heating with hydrogen iodide, HI.

\[\ce{\underset{\text{Glucose}}{CHO(CHOH)4CH2OH} ->[\Delta,HI] \underset{\text{n-Hexane}}{CH3-(CH2)4-CH3}}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 14: Biomolecules - Short Answer Questions (Type-II)

APPEARS IN

SCERT Maharashtra Chemistry [English] 12 Standard HSC
Chapter 14 Biomolecules
Short Answer Questions (Type-II) | Q 2.3

RELATED QUESTIONS

Give scientific reasons:

Hydrolysis of sucrose is called inversion.


Give two evidences for presence of formyl group in glucose.


Glucose on oxidation with dilute nitric acid gives _______________


Write the name of the polysaccharide used for the commercial preparation of glucose.


Explain the preparation of glucose from sucrose.


Classify the following carbohydrates into monosaccharide, disaccharide, oligosaccharide and polysaccharide:

glucose, cellulose, maltose, stachyose


What is the action of the following reagents on glucose?

hydroxylamine


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.


From the following which is a heteropolysaccharide?


Fructose is the fruit sugar and chemically it is ketohexose but it has a ______ rather than a ______.


Which is the product obtained, when Br2 water reacts with glucose?


Chitin is a/an ______.


Identify the CORRECT combination.


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


Which one of the following is an oligosaccharide?


Stachyose is ____________.


Which one of the following is Tetrose sugar? 


Which one of the following is NOT soluble in water?


Glucose and gluconic acid treated with dilute nitric acid forms saccharic acid. What does this indicate?


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


Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?


What is the number of hydroxyl groups present in lactic acid?


On hydrolysis sucrose gives ____________.


Which among the following reagents is used for conversion of glucose to glucoxime?


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


Which one of the following rotates the plane polarized light towards left?


\[\ce{Glucose ->[(HCN)] Product ->[(hydrolysis)] Product ->[(HI + Heat)] A}\], the compound A is:


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.


Why carbohydrates are generally optically active?


Classify the following into monosaccharides, oligosaccharides and polysaccharides.

Starch


Write the structure of α-D (+) glucopyranose.


Is the following sugar, D-sugar or L-sugar?


Lactose is made of ______.


The two monosaccharides in a disaccharide are held together by ______ bonds.

 


Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?


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


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


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


Carbohydrates that do not undergo hydrolysis further are called ______.


Write the ring structure of glucose.


Why carbohydrates are generally optically active.


Why carbohydrates are generally optically active.


Write the Zwitter ion structure of alanine.


Why carbohydrates are generally optically active?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×