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प्रश्न
Write the reaction involved when D-glucose is treated with the following reagent:
Br2 water
What happens when D-glucose is treated with the following reagent?
Bromine water
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उत्तर
When glucose is heated with bromine water, it is oxidised to gluconic acid, a six-carbon carboxylic acid.
\[\begin{array}{cc}
\phantom{......}\ce{CHO}\phantom{.....................}\ce{COOH}\phantom{}\\
|\phantom{............................}|\phantom{..}\\
\phantom{.......}\ce{(CHOH)4->[Br2 water](CHOH)4}\\
|\phantom{............................}|\phantom{..}\\
\phantom{.............}\ce{\underset{\text{D-glucose}}{CH2OH}}\phantom{...............}\ce{\underset{\text{D-gluconic acid}}{CH2OH}}\phantom{....}
\end{array}\]
संबंधित प्रश्न
Draw the simple Fisher projection formulae of D - (+) - glucose and D - (-) - fructose
How many moles of acetic anhydride will be required to form glucose pentaacetate from 2M of glucose?
(a) 2
(b) 5
(c) 10
(d) 2.5
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
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?
What is the most abundant organic compound on earth?
Acetylation of glucose yields ____________.
The symbols D and L represents ____________.
Glucose reacts with acetic anhydride to form ______.
Which of the following properties of glucose cannot be explained by its open chain structure?
(i) Glucose does not form hydrogen sulphite with NaHSO3.
(ii) On oxidation with HNO3 glucose gives saccharic acid.
(iii) Glucose is found to exist in two different crystalline forms which are named as α and β.
Which of the following reactions of glucose can be explained only by its cyclic structure?
A solution of D-glucose in water rotates the plane polarised light ____________.
The α-D glucose and β-D glucose differ from each other due to difference in carbon atom with respect to its ____________.
Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6?
| (I) |  |
| (II) |  |
| (III) |  |
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?
The number of asymmetric carbon atoms in the glucose molecule in open and cyclic form is ______.
When D-glucose reacts with HI, it forms ______.
Give the reaction of glucose with hydrogen cyanide. Presence of which group is confirmed by this reaction?
