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Which one of the following regarding density of water at atmospheric p

June 1, 2025 by rawan239

Which one of the following regarding density of water at atmospheric pressure is correct ?

Density of water at 4°C is 1000 kg/m³.

Density of water at 0°C is 1000 kg/m³.

Density of water at 0°C is 100 kg/m³.

Density of water at 4°C is 10 kg/m³.

This question was previously asked in

UPSC NDA-1 – 2021

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Density of water at atmospheric pressure is maximum at 4°C, and its value is approximately 1000 kg/m³.

Water exhibits anomalous expansion; its density increases from 0°C to 4°C, where it reaches its maximum density, and then decreases as the temperature rises above 4°C. At 0°C, water is less dense than at 4°C (whether in liquid or solid state).

The density of water at 0°C (liquid) is about 999.84 kg/m³, and the density of ice at 0°C is about 916.7 kg/m³. The value 1000 kg/m³ is a commonly used approximation for the density of liquid water at 4°C and is equivalent to 1 g/cm³.

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