A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air.

Mercury is the only metal that exists as liquid at room temperature. It can be obtained by heating Cinnabar (HgS), the sulphide ore of mercury. When the ore (Cinnabar ore) is heated in the air, it is first converted into mercuric oxide (HgO). After that Mercuric oxide is reduced to mercury on further heating

• Mercury is the metal which is liquid at room temperature. 
• Ore of Mercury is Cinnabar. 
• When we heat cinnabar in atmospheric oxygen following reaction takes place. 

2HgS + 3O₂ → 2HgO + 2SO₂ 

Mercuric oxide is again heated to get Mercury and Oxygen 

\(2HgO\overset{Heat}\rightarrow Hg +O_2 \)

• Mercury is the metal which is liquid at room temperature. 
• Ore of Mercury is Cinnabar. 
• When we heat cinnabar in atmospheric oxygen following reaction takes place. 

2HgS + 3O₂ → 2HgO + 2SO₂ 

Mercuric oxide is again heated to get Mercury and Oxygen 

\(2HgO\overset{Heat}\rightarrow Hg +O_2 \)