Milk consists of fat globules suspended in water, serving as an example of__________________?
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Answer: B. Emulsion
Explanation
Milk is a colloidal emulsion consisting of liquid butterfat globules dispersed throughout water. An emulsion requires two immiscible liquids where one is dispersed as small droplets within the other. Natural proteins act as emulsifying agents keeping the fat suspended without separating out immediately. Colloidal systems feature microscopic particles suspended evenly throughout a continuous fluid phase. Emulsions can be oil-in-water or water-in-oil depending on the continuous phase composition. Homogenization processes break down fat globules further to prevent cream separation in commercial milk.
Food science and dairy processing industries rely heavily on emulsion stability principles. Culinary mixtures like mayonnaise and salad dressings are common everyday examples of emulsions. Nutritional digestion of dairy fats depends on the finely dispersed emulsion structure of milk. Option A is a suspension, which involves solid particles suspended in a liquid rather than liquid droplets. Option C is a gel, which forms a semi-rigid network trapping liquid within a solid matrix. Option D is a true solution, where solute molecules dissolve completely at a molecular level.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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