A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.

Answer:

Metals low in activity series can be obtained by reducing their sulphides or oxides by heating. At room temperature, mercury is the only metal that exists as a liquid. It can be made by heating cinnabar (HgS), a mercury sulphide ore.

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+O2

 

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