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Question 30836
JEE Physics · Hard

Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Anomalous Expansion MCQ

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Anomalous ExpansionHardQuestion 30836

Question

Significance of water's anomalous expansion for aquatic life is:
  1. A
    Water freezes from bottom
  2. B
    Lakes freeze from top, keeping bottom at 4°C
    Correct
  3. C
    Fish migrate in winter
  4. D
    Oxygen dissolves more at 4°C

Correct answer

Lakes freeze from top, keeping bottom at 4°C

Explanation

Ice forms at the top since 4°C water sinks. Bottom stays at 4°C, allowing aquatic life to survive winters.

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