Question

The method is preferred for determining the molecular weight of a polymer is_ _ _ _ _ _.
A.osmotic pressure
B.Gas density
C.Lowering of freezing point
D.Direct weighing of a single molecule

Answer 1

We are asked to find the method for determining the molecular weight of a polymer. So, first we will discuss the molecular weight and then we will discuss the method used for determining the molecular weight of a polymer.

Complete step by step answer:
The molecular weight of a substance can be calculated using its chemical formula and the periodic table. Consider we want to calculate the molecular weight of acetone. The atomic weight is the total of the atomic weights of the atoms in the molecule. After this, we will take the atomic weight of the atoms from the periodic table.
The best method to calculate the molecular weight of a polymer is the method of Osmosis (a cycle by which particles of a dissolvable will in general go through a semipermeable layer from a less concentration solution into a concentrated one).
The osmotic pressure is estimated and the recipe which is CRT is applied, the measure of polymer included is known, temperature is called as and Mw can be determined appropriately.

So, the correct answer is Option A .

Additional Information:
Osmotic pressure is the most important factor that affects cells. Osmosis is the net movement of dissolvable particles through a mostly penetrable layer into a district of higher solute concentration. Osmoregulation is the homeostasis process of an organism to get the balance in osmotic pressure.

Note:
Osmotic pressure is known as the minimum pressure that must be applied to a solution to halt the flow of dissolvable atoms through a semipermeable layer (osmosis). It is dependent on the concentration of solute particles in the solution, this property is known as colligative property.
It shows the average length of the bulk resin's polymer chains. All polymer particles of a specific grade don't have precisely the same sub-atomic weight.