MCQ
In which of the following isolations no reducing agent is required?
- AIron from haematite.
- BAluminium from bauxite.
- ✓Mercury from cinnabar.
- Dinc from zinc blende.
✓
Answer
Correct option: C.
Mercury from cinnabar.
In the isolation of Mercury from cinnabar, no reducing agent is required. Mercury is obtained by the self-reduction method.
$\text{HgS}+\text{O}_2\xrightarrow{\triangle}2\text{HgO}+\text{SO}_2$
$\text{HgO}+\text{HgS}\rightarrow \text{Hg}+\text{SO}_2 $
$\text{HgS}+\text{O}_2\xrightarrow{\triangle}2\text{HgO}+\text{SO}_2$
$\text{HgO}+\text{HgS}\rightarrow \text{Hg}+\text{SO}_2 $
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