JAMB Chemistry 2016 Paper

Concept:Ethanol's solubility in water is due to its ability to form hydrogen bonds with water molecules.Explanation:Ethanol has the formula $\mathrm{C_2H_5OH}$.It contains a hydroxyl group, $-\mathrm{OH}$, which is polar.The $-\mathrm{OH}$ group forms hydrogen bonds with water, making ethanol miscible in water.Thus, the group responsible for this solubility is the hydroxyl group.Answer:B. Hydroxyl group