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chemistry

Which liquid metal is used for making thermometers?

A

Mercury

B

Bromine

C

Iodine

D

Cadmium

Answer

Mercury is used in many thermometers. 
Since Liquids have a definite volume but indefinite shape, it is convenient to use a liquid to make a thermometer since the liquid will expand/contract based on heating and you can measure the temperature with just a ruler. Mercury is a liquid for a large temperature range around room temperature, so it is convenient. 

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