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A metal is found in liquid state. It is ...

A metal is found in liquid state. It is widely used in instrument for measuring blood pressure. In what form does it occur in nature ? How can we extract this metal from its ore ?

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Mercury is the metal which is found in liquid state and is used in instruments for measuring blood pressure. It occurs in nature as sulphide ore in the form of Cinnabar (HgS). Mercury is obtained from purified cinnabar by roasting in the presence of air.
`HgS underset("Heat")overset("Air")rarr Hg + SO_(2)`
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