1) draw the lewis diagram for the molecule Lactose but do not include all its valence electrons

2. Analyse each bond so as to determine which one is polar or non polar and state .

3. Build a 3D structure of your molecule

4. State if the molecule is polar or non polar . and why

Answer:

Lactose is a large sugar molecule that is made up of two smaller sugar molecules, glucose and galactose. It is found in Milk also.

C-H and C-C bonds are non polar

C-O, and O-H bonds are polar.

1.. Lewis structure of lactose is

2. in lactose all O-H and C-O bonds are polar however C-H and C-C bonds are approximately non polar

3.. 3D structure of lactose given below.

4..As we see in structure of lactose, it consist a bunch of hydroxyl groups which make the molecule polar in nature.

due to high polarity of lactose, it is highly soluble in water.

Furthermore, fatty substance derived from milk such cheese are not soluble in water hence these compounds contains less amount of lactose.

PFA