Question

Liquids which do not dissolve in each other are called:
(A) Miscible liquids
(B) Immiscible liquids
(C) Dissociated liquids
(D) None of the above

Answer 1

Hint: The liquids have some forces of attraction. When they are mixed with another liquid and if the forces of attraction between these two liquids are greater than the forces of repulsion, then these liquids can be mixed. But when the forces of attraction between the liquids are less than the forces of repulsion, then the liquids do not mix with each other.

Complete answer:
We know that some liquids mix with each other but some don’t. We will now discuss the reason why some liquids can be mixed with each other while some can’t.
When two liquids are mixed with another liquid and if the forces of attraction between these two liquids are greater than the forces of repulsion, then these liquids can be mixed. But when the forces of attraction between the liquids are less than the forces of repulsion, then the liquids do not mix with each other.
So, the liquids which dissolve in each other are known as miscible liquids and the liquids which do not dissolve in each other are known as immiscible liquids.
Hence, the correct option is (B) Immiscible liquids.

Note:
We can determine the solubility of one liquid in another liquid by knowing their polarities. We know that substances dissolve like. For example: Water is a polar liquid and acts as a solvent when ethanol is dissolved in it. This happens because due to the polar hydroxyl bond in ethanol, it is also polar in nature and hence, it is miscible in water.