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Question
Account for the following:
What happens when D – glucose is treated with the following reagents
Bromine water
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Solution
\[\begin{array}{cc}
\phantom{.}\ce{CHO}\phantom{..............}\ce{COOH}\phantom{..}\\
\phantom{.}|\phantom{..................}|\phantom{.......}\\
\phantom{}\ce{(CHOH)4 ->[Br2 water] (CHOH)4}\\
\phantom{.}|\phantom{..................}|\phantom{.......}\\
\phantom{...}\ce{CH2OH}\phantom{..........}\ce{\underset{Gluconic acid}{CH2OH}}\phantom{..}
\end{array}\]
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RELATED QUESTIONS
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Differentiable between the following:
Amylose and Amylopectin
Glucose reacts with acetic anhydride to form ______.
Which of the following reactions of glucose can be explained only by its cyclic structure?
In the following reaction, identify A and B:
\[\begin{array}{cc}
\ce{C6H12O6 ->[Acetic anhydride] A}\\
\downarrow \text{Conc. nitric acid}\phantom{...}\\
\ce{B}\phantom{.................}\end{array}\]
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) |  |
Account for the following:
There are 5 OH groups in glucose
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:
Match List - I with List - II.
| List I | List II | ||
| (A) | Glucose + HI | (I) | Gluconic acid |
| (B) | Glucose + Br2 water | (II) | Glucose pentacetate |
| (C) | Glucose + acetic anhydride | (III) | Saccharic acid |
| (D) | Glucose + HNO3 | (IV) | Hexane |
Choose the correct answer from the options given below:
Give a reason for the following observations:
Penta-acetate of glucose does not react with hydroxylamine.
