GyanGramQuestion
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
PRELIMS 2011 · SCIENCE & TECHNOLOGY
The surface of a lake is frozen in severe winter, but the water at its bottom is still li…
Attempt this previous-year question. The correct option stays hidden until you choose.
Pick an option to check yourself.
• Correct Answer: C
• Water reaches maximum density at 4°C; denser water sinks to bottom while colder, less dense water stays at surface and freezes.
• Ice being a bad conductor is true but secondary; anomalous expansion of water is the primary reason.
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