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Consider the following reactions:
'x', 'y', and 'z' in the above-given reactions are, respectively:
1. 5, 4, and 5
2. 4, 6, and 5
3. 4, 5, and 5
4. 5, 6, and 5
| (i) | \(\small {Glucose + ROH} \xrightarrow { \text {dry HCl}} \text {Acetal} \xrightarrow [(CH_3CO)_2O] { x~ eq. of} \text {acetyl derivative}\) |
| (ii) | \(\text {Glucose } \xrightarrow { {Ni}/H_2} \text {A} \xrightarrow [(CH_3CO)_2O] { y~ eq. of} \text {acetyl derivative}\) |
| (iii) | \(\text {Glucose } \xrightarrow [(CH_3CO)_2O] { z~ eq. of} \text {acetyl derivative}\) |
1. 5, 4, and 5
2. 4, 6, and 5
3. 4, 5, and 5
4. 5, 6, and 5
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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Which of the following is true about a glycosidic linkage?
1. It contains a carbonyl bond
2. It contains an ether bond
3. It contains an ester bond
4. It contains an amide bond
1. It contains a carbonyl bond
2. It contains an ether bond
3. It contains an ester bond
4. It contains an amide bond
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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| Statement I: | Pentaacetate of cyclic glucose reacts with hydroxylamine |
| Statement II: | Glucose on oxidation with nitric acid yields gluconic acid. |
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Carbohydrates - Classification & D-L configuration |
51%
Level 3: 35%-60%
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Consider the sugars labelled X and Y in the image:
Which of the following statements about sugars X and Y are not correct?
1. a and b
2. a and d
3. a, c and d
4. b and c
Which of the following statements about sugars X and Y are not correct?
| a. | X is a reducing sugar, and Y is a non-reducing sugar. |
| b. | X is a non-reducing sugar, and Y is a reducing sugar. |
| c. | The glycosidic linkages in X and Y are \(\alpha\) and \(\beta\) respectively. |
| d. | The glycosidic linkages in X and Y are \(\beta\) and \(\alpha\) respectively. |
2. a and d
3. a, c and d
4. b and c
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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D-Glucose→HNO3 (dil) A);
Product (A) is :-
Oxidation of Glucose with dil HNO3
1. D-Gluconic acid
2. D-Glucitol
3. Sacchric acid
4. D-Glucaric acid
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 4: Below 35%
Hints
The Fisher presentation of D-glucose is given below:
The correct structure(s) of -L-glucopyranose is/(are):
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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The Fischer presentation of D-glucose is given below:
The correct structures of \(\beta-\)L-glucopyranose is/(are):
The correct structures of \(\beta-\)L-glucopyranose is/(are):
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Carbohydrates - Classification & D-L configuration |
69%
Level 2: 60%+
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