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The outer surface of a beaker containing ice cubes becomes wet in short while - Give scientific reason.

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Question  The outer surface of a beaker containing ice cubes becomes wet in short while. Answer  When ice cubes are placed in a beaker, ice starts melting.  The heat required for melting is absorbed from the surrounding air and also from the beaker to some extent.  Hence, the temperature of the air and beaker falls.  The capacity of air to hold water vapour depends upon the temperature of the air, and this capacity decreases as the temperature decreases.  At a certain low temperature, the surrounding air becomes saturated with water vapour present in it.  As the temperature falls further, the air is unable to hold all the water vapour.  Hence, the extra water vapour starts condensing on the cold outer surface of the beaker in the form of minute drops.  Therefore, The outer surface of the beaker containing ice cubes becomes wet in a short while.
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Study of Anomalous Behavior of Water Using Hope's Apparatus

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Study of Anomalous Behavior of Water Using Hope's Apparatus

1)A flat bowl is attached to cylindrical container where thermometers T1 and T2 are used to measure temperature. T2 above the container and T1 below container water is filled in cylindrical container a freezing mixture(ice and salt) is put in flat bowl.

2)Initially, the temperature of water lowers in middle part of cylinder due to freezing mixture.

3)As temperature ↓, volume↓ and density↑.

4)Water with higher density moves down. T2 thermometer shows rapid fall of temperature till it becomes 4 degree Celsius.
 volume
5)When temperature falls below 4 degree Celsius,  volume↑ and density↓. Hence moves upwards.

6)The Temperature T2 in upper part decreases rapidly to 0 degree Celsius.

7)The temperature T1 remains at 4 degree Celsius for some time and then decreases slowly to 0 degree Celsius.
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