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प्रश्न
What do you understand by the anomalous expansion of water?
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उत्तर
Anomalous expansion: A liquid that does not behave like a normal liquid on heating or cooling is said to have anomalous expansion. On heating or cooling, water does not behave like a normal liquid. The volume of water increases if we heat or cool it, provided initially the water is at 4°C.
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संबंधित प्रश्न
Water is used as a cooling agent.
A calorimeter contains 50 g of water at 50°C. The temperature falls to 45°C in 10 minutes. When the calorimeter contains 100 g of water at 50°C, it takes 18 minutes for the temperature to become 45°C. Find the water equivalent of the calorimeter.
Describe an experiment to show that water has maximum density at 4°C. What important consequences follow this peculiar property of water? Discuss the importance of this phenomenon in nature.
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
What are land and sea breezes? Explain with the help of a labeled diagram.
Study the following diagrams and write down your observations.
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
Observe the given graph and answer the following questions:
- Name the process represented in the figure.
- At what temperature does this process take place?
While studying anomalous behaviour of water in Hope’s apparatus, the upper temperature of the thermometer : 0 °C : : lower temperature of the thermometer : _______
Draw a neat and labelled diagram of Hope’s apparatus.
