Hydrogen bonding enables ethylene glycol's de-icing properties

Steps:

• Analyze ethylene glycol's structure: HOCH₂CH₂OH has two -OH groups for hydrogen bonding.
• Evaluate statement A: -OH groups donate/accept H-bonds between ethylene glycol molecules.
• Evaluate statement B: Polarity and H-bonding make it miscible with water from melted ice.
• Evaluate statement C: Ethylene glycol's -OH forms H-bonds with water's -OH and lone pairs.

Why A is correct:

• Hydrogen bonding definition: Molecules with O-H groups like ethylene glycol form intermolecular H-bonds, stabilizing its liquid state below 0°C.

Why the others are wrong:

• B: Incorrect; ethylene glycol is added to prevent freezing, not specifically to dissolve in water already formed from ice.
• C: Incorrect; while miscible, de-icing relies on colligative properties, not direct H-bonding with water.
• D: Not enough information.

Final answer: A