Sucrose in water is dextrorotatory, when boiled with dil.HCl, the solution becomes leavorotatory, 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
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
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
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)
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
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
Which one of the following compounds shows the presence of an intramolecular hydrogen bond?
1. H2O2
2. HCN
3. Cellulose
4. Concentrated acetic acid
Waxes are esters of:
1. Glycerol and fatty acid.
2. Long-chain alcohols and long-chain fatty acids.
3. Glycerol.
4. Long-chain alcohol.
Which of the following carbohydrates is not oxidized by bromine water?
1. D - Galactose
2. D - Glucose
3. D - Fructose
4. D - Mannose
The compound that does not reduce Benedict's solution is:
1. | Glucose | 2. | Fructose |
3. | Sucrose | 4. | Aldehyde |