Answer :

To determine the boiling point of water:


Activity:


i. Take small amount of water in a beaker and suspend a thermometer so that its bulb (lower part) is in contact with the ice.


ii. Put a glass rod in the beaker and start heating the beaker till the water starts boiling.


iii. Note the temperature when the water converts into gaseous state.



Conclusion: The temperature at which the water starts boiling at the atmospheric pressure is called boiling point of water.


To determine the melting point of ice:


Activity:


i. Take about 150 g in beaker and suspend a thermometer so that its bulb (lower part) is in contact with the ice.


ii. Start heating the beaker at a very low flame.


iii. Note the temperature when the ice starts melting.



Conclusion: The temperature at which the ice starts melting into liquid state is called melting point of ice.


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