Disaccharide

Q.

Why Is Fructose Hexose?

Q.
On acid hydrolysis of above disaccharide, we get:

1. Two moles of glucose
2. One mole of glucose
3. One mole of galactose
4. One mole of glucose and one mole of galactose

Q.

Regarding lactose, some statements are given below

A) On hydrolysis, lactose gives β-D-galactose and β-D-glucose

B) In lactose C₁ of β-D-galactose has acetal structure and C₁ of β-D-glucose has hemiacetal structure

C) In lactose molecule, β-D-galactose is a non-reducing unit and β-D-glucose is reducing unit

The correct statements are

1. A, C

2. A, B

3. B, C

4. Only A

Q. Which of the following is the sweetest sugar?

1. Glucose
2. Fructose
3. Lactose
4. Sucrose

Q. On heating glucose with Fehling's solution we get a precipitate whose colour is

1. Yellow
2. Red
3. Black
4. White

Q.

Lactose molecule is made up of β-d (-) galactopyranose and β-d (+) gluco pyraonose. The number of - OH groups present in it are

1. 10

2. 8

3. 6

4. 4