Question
Write short notes :
Anomalous behaviour of water
Anomalous behaviour of water
✓
Answer
(i) Generally, liquids expand on heating and contract on cooling.
(ii) Water however shows an exceptional behaviour.
(iii) If water at room temperature is cooled, it contracts till 4°C, but if it is cooled below 4°C (between 4°C and 0°C), it expands instead of contracting.
(iv) On the contrary, if water at 0°C is heated, it contracts instead of expanding upto 4°C.
(v) This exceptional behaviour of water between 4°C and 0°C is called anomalous behaviour of water.
(vi) Examples found in nature:
(a) Survival of aquatic plants and animals.
(b) Cracking of rocks in winter.
(c) Pipes conducting water in cold regions burst in a winter.
(ii) Water however shows an exceptional behaviour.
(iii) If water at room temperature is cooled, it contracts till 4°C, but if it is cooled below 4°C (between 4°C and 0°C), it expands instead of contracting.
(iv) On the contrary, if water at 0°C is heated, it contracts instead of expanding upto 4°C.
(v) This exceptional behaviour of water between 4°C and 0°C is called anomalous behaviour of water.
(vi) Examples found in nature:
(a) Survival of aquatic plants and animals.
(b) Cracking of rocks in winter.
(c) Pipes conducting water in cold regions burst in a winter.
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