The pH of milk is_______?
Correct answer: B. 6.5-7
- A. 9
- B. 6.5-7
- C. 8
- D. 12
Explanation
Fresh milk is slightly acidic, with a normal pH close to 6.5 to 6.7, mainly because of dissolved carbon dioxide, phosphates and lactic components. The likely mistake is choosing 8 or 9 by assuming all food liquids are basic, whereas milk is near neutral but slightly acidic.
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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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