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Chemistry Medium PPSC Uploaded: 07 Aug 2026

What is the density of pure water at 4°C?

  • A 2.0 g/cm3
  • B 0.5 g/cm3
  • C 1.0 g/cm3
  • D 1.5 g/cm3
Correct Answer: Option C — 1.0 g/cm3
Explanation:
Pure water reaches its maximum density of 1.0 g/cm3 at 4°C, which is used as the reference standard for specific gravity measurements. This unique property causes ice to float since it is less dense than liquid water.
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