1.

Describe briefly the method to obtain mercury from Cinnabar. Write the chemical equations for the reactions involved in the process.

Answer»

Solution :When CINNABAR (HgS) is heated in the presence of air, it is first converted into MERCURIC OXIDE.
`2Hg(S) + underset("(air)")(3O_(2))overset("HEAT")rarr 2HgO + SO_(2)`
Mercuric oxide is then reduced to mercury on further heating.
`2HgO overset("Heat")rarr 2Hg + O_(2)`


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