Question

White – Vincent method is used for

• A. Viscosity measurement
• B. Surface tension measurement
• C. Osmotic pressure measurement
• D. Isotonicity adjustment

Hint:

Surface tension measurement is essential in understanding the behavior of liquids. The White-Vincent method is a popular technique for this measurement.

Answer 1

The Correct Option is B

The White-Vincent method is a technique for measuring the surface tension of a liquid. Since surface tension governs phenomena such as wetting, spreading and droplet formation, methods like this are important in pharmaceutical formulation work where interfacial behavior affects product performance. None of the other listed properties (viscosity, osmotic pressure, isotonicity) are what this particular method is used to assess.

Therefore, the correct answer is Surface tension measurement.

Answer 2

Another way to confirm this is to think about which measurement techniques are conventionally paired with each property, and see where the White-Vincent method fits.

1. Viscosity measurement: Standard techniques here include Ostwald and Ubbelohde viscometers, which are distinct instruments from the White-Vincent approach.
2. Surface tension measurement: Surface tension is commonly determined by methods such as the du Noüy ring, capillary rise, or drop-weight techniques, and the White-Vincent method belongs to this same family of surface-property determinations.
3. Osmotic pressure measurement: This is instead measured using freezing-point depression osmometers, a completely different experimental setup.
4. Isotonicity adjustment: This is a calculation-based formulation step, not an experimental measurement technique at all, so it cannot be what White-Vincent refers to.

Grouping the White-Vincent method with other surface-tension techniques confirms its purpose.

Therefore, the correct answer is Surface tension measurement.