Chemistry · Determination of molecular mass using colligative properties, abnormal value of molar mass, van't Hoff factor and its significance
The method preferred for determining the molecular weight of a polymer is
The method 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
Step-by-step solution
Osmotic pressure is preferred for determining polymer molecular weight because it is a colligative property with high sensitivity, allowing accurate measurement for high molecular weight polymers where other methods like freezing point depression give negligible changes. Gas density is for volatile compounds, not polymers, and direct weighing of a single molecule is impractical.