Question

Which among the following compounds is most soluble in water?

• A. Ethanol
• B. Ethane
• C. Phenol
• D. Ethylene glycol

Answer 1

The Correct Option is D

Ethylene glycol is the most soluble in water due to its ability to form hydrogen bonds.

Answer 2

Ethylene glycol (C₂H₆O₂) is highly soluble in water due to its ability to form hydrogen bonds with water molecules. The molecule contains two hydroxyl groups (–OH) that can interact with water molecules through hydrogen bonding. This interaction allows ethylene glycol to dissolve easily in water, as the hydrogen bonds between the –OH groups and water molecules help to break apart the water structure and integrate the ethylene glycol into the solution.

The presence of these hydroxyl groups makes ethylene glycol a polar molecule, which enhances its ability to interact with the polar water molecules. This is in contrast to non-polar substances, which are typically less soluble in water. Ethylene glycol’s high solubility in water is one of the reasons it is commonly used as an antifreeze and in various industrial applications, where its ability to mix with water is important.