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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Give reason of Ice floats on water. - Chemistry

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प्रश्न

Give reason of Ice floats on water.

एक पंक्ति में उत्तर

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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Anomalous Expansion of Water
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अध्याय 8: Water - Exercise I [पृष्ठ १०७]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 8 Water
Exercise I | Q 6.4 | पृष्ठ १०७

संबंधित प्रश्न

On a winter day the temperature of the tap water is 20°C whereas the room temperature is 5°C. Water is stored in a tank of capacity 0.5 m3 for household use. If it were possible to use the heat liberated by the water to lift a 10 kg mass vertically, how high can it be lifted as the water comes to the room temperature? Take g = 10 m s−2.


A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C, how much water can be heated with this energy?


Explain the following

Fishes survive in ponds even when the atmospheric temperature is well below 0°C.


Explain, why are soft drink bottles not completely filled?


Why does a thick glass tumbler crack when very hot water is poured in it?


The following diagrams illustrate three situations involving thermometers which are labeled A, Band C. In each situation the thermometers indicate different readings.

(i) What do you expect the approximate reading of the thermometer B and C would be? Give a reason for your answer.
(ii) How would the readings of A and B help you in calibrating a thermometer?


Water at 0°C is heated to 10°C. Sketch a temperature-volume graph to show the behavior of heating.

On a faulty thermometer, a lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?

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Observe the following diagram and write the answers to the questions given below.

  1. Which process does the graph represent?
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