Which one of the following mixtures will not have uniform composition?

Oil in water

Sulphur in carbon disulphide

Alcohol in water

Sugar in water

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC Geoscientist – 2022

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The correct answer is Oil in water.

A mixture with uniform composition throughout is called a homogeneous mixture, while a mixture with non-uniform composition is called a heterogeneous mixture. Solutions (like sugar in water, alcohol in water, sulphur in carbon disulphide) are homogeneous mixtures.

Oil and water are immiscible liquids, meaning they do not dissolve in each other. When mixed, they form distinct layers, resulting in a heterogeneous mixture with non-uniform composition.

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