Question

In an experiment to determine the boiling point of water, state reason for the followingprecautions:-(i) The bulb of thermometer should not touch the sides of beaker.(ii) While boiling water, pumice stones should be added.

Answer 1

1)On Touching the sides, the thermometer may read the temperature of the container instead of the water.
2) Pumice stones filter the water through their pores