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Explanation of mercury ore? |
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Answer» Main ore of mercury is cinnarbar, HgS.The extraction of mercury from cinnabar ore involves two steps:1. The concentrated mercury (II) sulphide ore is roasted in air to form mercuric oxide (HgO).2. This Mercuric oxide formed is then reduced to mercury on further heating to about 300oC.2HgS(s) + 3O2(g) {tex}\\;\\xrightarrow\\triangle{/tex} 2HgO(s) + 2SO2(g)2HgO (s) {tex}\\;\\xrightarrow\\triangle{/tex}2Hg(l) + O2 (g)\xa0 Mercury belongs to least reactivity series. It have a sulphide ore called cinnabar. (HgS). Cinnabar is first heated in air. Which turns HgS into HgO with liberation of So2. Mercury oxide so obtained is again heated strongly . this reduces Mercury oxide to Mercury metal. HgS+O2 gives HgO+So2... THEN, HgO gives Hg+O2. |
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