Question

why only mercury is used in thermometer?


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Answer 1

Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.

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Answer 2

becoz it raises with little raise in temp and is shiny so clearly visible