Give reasons:
Water pipes burst in severe winters.
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During severe winters when temperature starts falling below 4°C, water in pipelines expands (due to property of anomalous expansion of water) and it exerts large pressure on the pipes causing them to burst.
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Name the two gases from which water is formed. What is the chemical composition of these two gases in water? Give the molecular formula of water.
Water is used as a cooling agent.
It is difficult to cook in hills as compared to plains.
Ice floats on water.