Hydrocarbon fuels are described as:

• A. They are polar solvents
• B. They do not mix with water
• C. They are always water-based fuels
• D. They are salts

Answer: (B)

Hydrocarbon fuels are nonpolar molecules made primarily of carbon and hydrogen. Water, on the other hand, is highly polar and forms strong hydrogen bonds. Because of this difference, nonpolar substances do not mix with water—the principle often summarized as “like dissolves like.” Hydrocarbon fuels therefore form a separate layer when combined with water and are immiscible.

That’s why the description fits: they are not polar solvents, they are not typically water-based fuels, and they are not salts. These points don’t align with how hydrocarbons behave chemically, whereas immiscibility with water is a defining characteristic.