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प्रश्न
Account for the following:
What happens when D – glucose is treated with the following reagents
Bromine water
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उत्तर
\[\begin{array}{cc}
\phantom{.}\ce{CHO}\phantom{..............}\ce{COOH}\phantom{..}\\
\phantom{.}|\phantom{..................}|\phantom{.......}\\
\phantom{}\ce{(CHOH)4 ->[Br2 water] (CHOH)4}\\
\phantom{.}|\phantom{..................}|\phantom{.......}\\
\phantom{...}\ce{CH2OH}\phantom{..........}\ce{\underset{Gluconic acid}{CH2OH}}\phantom{..}
\end{array}\]
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संबंधित प्रश्न
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
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.
The spatial arrangement of the given molecule is denoted by:
Glucose does not react with ____________.
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?
The number of chiral carbons in ß-D(+) glucose is ____________.
Account for the following:
What happens when D – glucose is treated with the following reagents
HNO3
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:
Give a reason for the following observations:
Penta-acetate of glucose does not react with hydroxylamine.
