The mixture of oil and water is allowed to settle for a while. What will be our final observation?

Forms a solution

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Forms a colloid

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Forms different layers

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Forms an emulsion

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Solution

The correct option is C
Forms different layers

When the mixture of oil and water is allowed to settle for a while, it forms separate layers because they are immiscible. Immiscible is the word used to refer to liquids which don't mix.

An emulsion is a colloid of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. Examples: oil and water mixtures form emulsions when shaken together.

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