question_answer

Give four reasons why is mercury used in thermometers.

Answer:

                The reasons for using mercury in a thermometer are (i) Mercury has a uniform expansion over a wide range of temperature. (ii) Mercury is opaque and bright, so it can be easily seen in a glass tube. (iii) It does not stick to the walls of the glass tube. (iv) It is a good conductor of heat and has low thermal capacity.