What property of water allows ice to float in liquid water?

• A. Ice has a higher boiling point than liquid water
• B. Ice has a higher surface tension than liquid water
• C. Ice is less dense than liquid water
• D. Ice is more viscous than liquid water

Answer: (C)

Verified step by step guidance

1. Understand the concept of density: Density is defined as mass per unit volume. It determines whether a substance will float or sink in another substance.
2. Recognize the unique property of water: Water is one of the few substances that is less dense in its solid form (ice) than in its liquid form.
3. Explore the molecular structure of ice: In ice, water molecules form a crystalline structure maintained by hydrogen bonds, which spaces the molecules further apart compared to liquid water.
4. Relate density to buoyancy: Since ice is less dense than liquid water, it will float. This is because the mass of ice is spread over a larger volume, making it less dense.
5. Conclude with the correct property: The property that allows ice to float on liquid water is its lower density compared to liquid water.