Question

Give four precautions for the experiment of determining the melting point of ice (water)

Answer 1

For melting point of ice: Precautions: 1.The bulb of the thermometer should be kept surrounded with ice cubes. 2.Ice should be stirred regularly to keep a uniform temperature throughout.
3.Note temperature by keeping your eyes in line with the level of mercury.

For boiling point of water:
Precautions:
1. The bulb of the thermometer should be kept about 4-5 cm above the surface of water.
2.Pieces of pumice stone should be added to water before heating to avoid bumping.
3.Heating of water should be done by rotating the flame.Note temperature by keeping your eyes in line with the level of mercury.

Answer 2

EXPERIMENT. AIM To determine the melting point of ice and the boiling point ... PRECAUTIONS ... The boiling point of water is 100 °C, i.e. the vapour ... Give reason.