Which of the following is unit of Viscosity?
Correct answer: C. Poise
- A. Decibell
- B. Torr
- C. Poise
- D. Hertz
Explanation
The poise is the CGS unit of dynamic viscosity, which measures a liquid's resistance to flow. Decibel measures sound intensity, torr measures pressure, and hertz measures frequency, so students may confuse other physical units with viscosity.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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