Why is mercury used in a thermometer? - Vidyadip

Question

Why is mercury used in a thermometer?

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Answer

Mercury is used in a thermometer because of the following properties.

There is a big difference between the freezing point and boiling point of mercury. Its freezing point is – 39° C and its boiling point is 357° C.
It is shiny and can be easily seen.
It does not stick to glass.
It expands regularly and uniformly in all conditions.

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