cinnabar is heated in the presence of air ..write this in chemical equation
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The cinnabar is heated in presence of air to get oxide of mercury which is then decomposed to pure metal on heating .
Reactions involved are:
2HgS(s) + 3O2(g) -------------------> 2HgO(s) + 2SO2 (g)
2HgO(s) ------------------> 2Hg (l) + O2 (g)
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