The value of surface tension of isopropyl alcohol is:
Correct answer: A. Less than water
- A. Less than water
- B. Less than ethylene glycol
- C. Less than methyl alcohol
- D. Same as ethyl alcohol
Explanation
Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible.The SI unit of Surface Tension is Newton per Meter or N/m. Isopropyl Alcohol has a surface tension of value of (at 20°C) = 23.0 mN/m. Option A is correct as the surface tension of water is about 72 mN/m at room temperature which is one of the highest surface tension for liquid. Option B is incorrect as Ethylene Glycol has a surface tension of 47.3mN/m. Option C is incorrect as Methanol has a surface tension of 22.5mN/m. Option D is incorrect as Ethanol has a surface tension of 22.39mN/m.
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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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