Rank the following in terms of decreasing miscibility in C₈H₁₈ (octane), a major component of gasoline:

C₂H₅Cl (chloroethane),

H₂O (water),

C₂H₅F (fluoroethane), and

C₉H₂₀ (nonane).

In order of decreasing miscibility

C₉H₂₀ (nonane) →C₂H₅F (fluoroethane) →C₂H₅Cl (chloroethane) →H₂O (water)

Explanation:

The solubility of a solid is a measure of its ability to dissolve in a liquid while for liquids, the miscibility is a measure of thhe liquid to mix with anoyjer liquid resulting in a soltion which can hold any amount of either liquids. Immiscible liquids are those that are not soluble or have very limited solibility with each other.

C₉H₂₀ (nonane) →C₂H₅F (fluoroethane) →C₂H₅Cl (chloroethane) →H₂O (water)

In the order of decreasing miscibility as like dissolve like, ability to dissociate and polar and organic characteristics are considered