Multiple choice

Why does ice in coke float and does not sink?

  1. Ice is hollow.

  2. Water on freezing expands and becomes less dense.

  3. Water molecules and ice molecules repel each other.

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is correct as by the time water has cooled to 40C., the molecules' energy has dropped enough that they are very near each another. So each H2O molecule forms more stable hydrogen bonds, with up to four fellow molecules. At 00C, the molecules in ice are held rigidly apart. That means more empty space between molecules, so frozen water occupies more room and is less dense.

Keep practicing — related questions