Question

The example of heterogeneous mixture is:
[A]water and stone
[B]water and lemon juice.
[C]water and alcohol
[D]water and sugar

Answer 1

Hint:Mixtures can be classified into two types, homogeneous and heterogeneous. Homogeneous mixtures are consistent throughout and heterogeneous mixtures have non uniform composition.

Complete step by step answer:
As we can understand from the term itself where ‘hetero’ means different, a heterogeneous mixture is a mixture in which the proportions of its components are different throughout.
Any mixture which is non-uniform i.e. composition varies from one region to another, has two different phases which remain separate from each other with identifiable properties are termed as a heterogeneous mixture.
Now, let us take each of the options and see if they are a heterogeneous mixture or not.
In option [D], there is a mixture of water and sugar. If we keep adding sugar in water until saturation is reached, a sugar-water saturated solution will be formed which will have the same consistency throughout and there will be no differentiable physical states visible. Therefore, sugar and water will not form a heterogeneous mixture.
However, if the solution becomes supersaturated, then sugar crystals might be visible hence making a heterogeneous mixture.
In option [C], we have a mixture of alcohol and water. Since alcohols are completely soluble in water, therefore it will not form a heterogeneous mixture.
In option [B], we have a mixture of lemon juice and water which will again mix and give a homogeneous solution.
Lastly, in option [A] we have stone and water, which will have two completely differential phases i.e. the stone and water. As stone cannot be mixed in water to give an all over uniform mixture, therefore it is a heterogeneous mixture.
Therefore, the correct answer is option [A] stone and water.

Note: It is important to note here that heterogeneous mixtures will have two or more different phases visible to the eye like a mixture of oil and water, we can easily differentiate the oil phase and the water phase by looking at the mixture.
It is also important to remember that a solution containing precipitate is also a heterogeneous solution as it will not be consistent throughout and also the precipitate will have different physical properties than that of the solution.