Which substance dissolves readily in water?

Correct answer: Alcohol. Alcohol (ethanol) mixes completely with water.

Background: Alcohol molecules can form hydrogen bonds with water.

• Oil: Oil does not dissolve in water.
• Petrol: Petrol does not dissolve in water.
• Wax: Wax does not dissolve in water.

Did you know? “Like dissolves like”: polar substances dissolve in water.

Memory trick: Alcohol + water mix.