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प्रश्न
Give reason of Ice floats on water.
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उत्तर
Ice has a low density as compared to water. Water has a maximum density at 4°C. That is why ice floats on water.
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संबंधित प्रश्न
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?
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
A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.
Why does a thick glass tumbler crack when very hot water is poured in it?
The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.

What will be the approximate temperature of water in the lake shown in the following diagram?

(i) At X, and
(ii) At Y?
Observe the given graph and answer the following questions:

- Name the process represented in the figure.
- At what temperature does this process take place?
When the temperature of water decreases below 4 °C it’s volume _______.
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.

