Topics:
Animal Refresher, Dairy Science
Physical Properties of Milk — True Statements
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Question (English)
Which of the following statement(s) is/are true about physical properties of milk?
- Both: Viscosity of whole milk at 25°C is about 2.0 centipoise AND Surface tension is about 50 dyne cm⁻¹ at 20°C ✓ Correct
- Only: Viscosity of whole milk at 25°C is about 2.0 centipoise
- Only: Surface tension of milk is about 50 dyne cm⁻¹ at 20°C
- None of the above
Explanation:
Correct Answer: Both statements are true
Both the given statements about the physical properties of milk are correct.
Physical Properties of Milk
- Viscosity of whole milk at 25°C: 1.5–2.0 centipoise ✔ (~2.0 centipoise)
- Surface tension of milk at 20°C: 54.5 dyne/cm (~50 dyne/cm) ✔
Effect of Treatments on Viscosity
- Increase in temperature → viscosity decreases
- After homogenization → viscosity increases (due to increase in number and surface area of fat globules)
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This multiple choice question is from Animal Refresher, Dairy Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
