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Name the main ore of mercury. …

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Name the main ore of mercury. How is mercury obtained from its ore?

Posted by Ganesh Sharma 5 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Ganesh Sharma 5 years, 2 months ago

Thanks Yogita

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Yogita Ingle 5 years, 2 months ago

Mercury is obtained from its sulphide ore called cinnabar, HgS which is actually mercury(ii) sulphide.
The following steps are involved in its extraction:
1. mercury ore is roasted
2HgS(s) + 3 O₂ (g) -----> 2HgO (s ) + 2 SO₂ (g)
2. when this mercury oxide is heated at about 300 degrees Celsius , it decomposes to form mercury metal.
2HgO (s) ------> 2Hg (l) + O₂(g)

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