Question

Why is mercury considered as a good thermometric liquid?(2marks)
(please answer it elaborately)​

Answer 1

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Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

OR

Mercury is the only metal that is in liquid state at room temperature. It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. Mercury has a boiling point which makes it suitable to measure higher temperatures.

BE BRAINLY ⚡

Answer 2

metals all are solid in room temperature were as the mercury is liquid in room temperature. and it is high coefficient of expansion. if temperature is high the mercury expand and when temperature low the mercury will contract.