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What is the correct comparison between milk and salt water?

Answer and explanation

Correct answer: Milk is a colloid, whereas salt water is a true solution.

Milk is commonly classified as an emulsion, which is a type of colloid: tiny droplets of one liquid are dispersed through another liquid, and the particles are larger than those in a true solution. Salt water is formed when sodium chloride dissolves uniformly in water at the molecular or ionic level, so it is a homogeneous true solution. Therefore option A is correct. Milk is not an element, and salt water is not a single compound because its salt-to-water ratio can vary and it can be separated by physical methods. Neither substance is a gas under ordinary conditions, so options B, C and D confuse the states or classifications of matter.

Related tags

ChemistryNature-Of-MatterColloidsTrue-SolutionsMilkNature Of MatterSome Basic Concepts Of ChemistryClass 11 Mcq

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