Sucrose in water is dextrorotatory, αD=+66.4° when boiled with dil.HCl, the solution becomes leavorotatory, αD=-39.9°. In this process the sucrose breaks into

1. L-glucose + D-fructose

2. L-glucose + L-fructose

3. D-glucose + D-fructose

4. D-glucose + L-fructose

Subtopic:  Polysaccharides & their Importance |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following pair gives same phenyl osazone ?

(1) D-Glucose and D-Allose

(2) D-Glucose and D-Alfrose

(3) D-Glucose and D-Mannose

(4) D-Glucose and D-Talose

Subtopic:  Polysaccharides & their Importance |
 83%
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NEET 2023 - Target Batch - Aryan Raj Singh
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For the complex conversion of D-glucose into the corresponding osazone, the minimum number of equivalents of phenyl hydrazine required is :

(1) two

(2) three

(3) four

(4) five

Subtopic:  Polysaccharides & their Importance |
 85%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which reagent/s can be used to distinguish glucose and fructose?

(I) Bromine water (II) furfural test (III) Schiff’s reagent

1. (I), (II) and (III)

2. (II) and (III)

3. (I)  & (II)

4. Only (Ill)

Subtopic:  Carbohydrates - Classification & D-L configuration | Polysaccharides & their Importance |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

One mole of glucose on respiration produces:-

(1)36 mole of ATP

(2)34 mole of ATP

(3)40 mole of ATP

(4)38 mole of ATP

Subtopic:  Polysaccharides & their Importance |
 62%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which one of the following statements is not true regarding (+) lactose?

1. (+) lactose is a β-glycoside formed by the union of a molecule of D(+) glucose and a

molecule of D(+) galactose

2. (+) lactose is a reducing sugar and does not exhibit mutarotation

3. (+) lactose, C12H22O11 contains 8-OH groups

4. On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose

Subtopic:  Carbohydrates - Classification & D-L configuration | Polysaccharides & their Importance |
 50%
From NCERT
NEET - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh

Which one of the following compounds shows the presence of an intramolecular hydrogen bond?

1. H2O2

2. HCN

3. Cellulose

4. Concentrated acetic acid

Subtopic:  Polysaccharides & their Importance |
 56%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh

Waxes are esters of:

1. Glycerol and fatty acid.

2. Long-chain alcohols and long-chain fatty acids.

3. Glycerol.

4. Long-chain alcohol.

Subtopic:  Polysaccharides & their Importance |
 53%
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Hints

Which of the following carbohydrates is not oxidized by bromine water?

1.  D - Galactose

2.  D - Glucose

3.  D - Fructose

4.  D - Mannose

Subtopic:  Polysaccharides & their Importance |
 57%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The compound that does not reduce Benedict's solution is: 

1. Glucose 2. Fructose
3. Sucrose 4. Aldehyde
Subtopic:  Polysaccharides & their Importance |
 75%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh