Pure water is a colorless, transparent, clear liquid at room temperature. It is odorless and tasteless.

When water is cooled, it first contracts in volume just like other liquids up to 4°C. On further cooling, it expands instead of contracting. This expansion takes place up to 0°C. Thus, at 0°C, water has maximum volume and minimum density. At 0°C, it becomes ice and has a density of 0.92 g/cm3, and floats on water

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