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Q100 (NDA-I/2024) Science & Technology › Basic Science (Physics, Chemistry, Biology) Official Key

Which one among the following statements with reference to the properties of water is not correct ?

Result
Your answer: —  Â·  Correct: B
Explanation

Option B is the incorrect statement because the latent heat of fusion of water is actually very high (approximately 334 J/g or 80 cal/g), not low. This property ensures that ice melts slowly, which is crucial for regulating global temperatures and preventing rapid flooding in glacial regions.

  • Specific Heat: Water has an abnormally high specific heat capacity, meaning it can absorb or release large amounts of heat with minimal change in its own temperature.
  • Density: Water is most dense at 4°C. Due to hydrogen bonding, ice forms a crystalline lattice that is less dense than liquid water, which is why ice floats.
  • Conductivity: Pure water is a poor conductor of electricity because it lacks dissolved ions. Electricity is conducted in water only when impurities like salts or minerals are present to provide mobile charge carriers.
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