Which instrument is used to measure the viscosity.?
Correct answer: D. Viscometer
- A. Hygrometer
- B. Hydrometer
- C. Anemometer
- D. Viscometer
Explanation
A viscometer measures a liquid's viscosity by measuring its resistance to flow under specified conditions. A hygrometer measures humidity, a hydrometer measures relative density, and an anemometer measures wind speed. Students may choose a hydrometer because both instruments are used with liquids, but a hydrometer does not measure flow resistance.
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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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