Topics:
Animal Refresher, Dairy Science
Refractive Index of Milk at 20°C
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Question (English)
The refractive index of milk at 20°C ranges from:
- 1.344–1.348 ✓ Correct
- 1.30–1.35
- 1.44–1.55
- 1.028–1.032
Explanation:
Correct Answer: 1.344–1.348
The refractive index of milk at 20°C is 1.344–1.348, measured using a Zeiss Refractometer.
Physical Properties of Milk — Normal Values
- Specific gravity: Cow: 1.028–1.030 | Buffalo: 1.030–1.032
- Refractive index: 1.344–1.348 at 20°C ✔
- Viscosity: 1.5–2.0 centipoise at 25°C
- Surface tension: 54.5 dyne/cm at 20°C
- Boiling point: 100.5°C
- pH of cow milk: 6.4–6.6 | Buffalo: 6.7–6.8
- Freezing point: −0.535°C to −0.550°C
📚 About this Topic — Animal Refresher
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.
