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Which of the following metal is used as a thermometric liquid?(a) Iron(b) Copper(c) Mercury(d) PotassiumI have been asked this question by my college director while I was bunking the class.Query is from D and F-Block Elements topic in portion D and F-Block Elements of Chemistry – Class 12

Answer»

The correct CHOICE is (c) Mercury

Best explanation: Mercury (atomic no.80, symbol-Hg) is the only liquid metal at ROOM temperature. It has a high coefficient of expansion and boiling point. This HELPS us to identify even the SLIGHTEST change in temperature of the SURROUNDINGS.



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