A) \[Cu\]
B) \[Pb\]
C) \[Hg\]
D) \[Zn\]
Correct Answer: C
Solution :
When conc. \[HgS\] ore is roasted \[HgS+{{O}_{2}}\xrightarrow{773-873K}Hg+S{{O}_{2}}\] At this temperature, mercury vaporises and the vapours are condensed to the liquid metal. Mercury so obtained is about 99.7% pure.
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