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What is the main difference between salt water and sand water?

Answer and explanation

Correct answer: Salt water is homogeneous and sand water is heterogeneous

The governing concept is the classification of mixtures by uniformity. In salt water, salt dissolves and its particles distribute essentially uniformly throughout the sample, so the mixture is homogeneous and appears as one phase. In sand water, sand does not dissolve; its particles remain separate, may settle, and make the composition non-uniform from one part to another. It is therefore a heterogeneous mixture. Option A correctly states this difference. Neither sample is a pure element or a single fixed compound, so options B and C are incorrect. Both are ordinarily liquid mixtures, not gases, which eliminates option D. Filtration can separate sand from water, whereas dissolved salt requires evaporation or another suitable method.

Related tags

ChemistryNature-Of-MatterHomogeneous-MixtureHeterogeneous-MixtureClass-11Nature Of MatterSome Basic Concepts Of ChemistryClass 11 Mcq

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