MCQ
The calomel electrode used as a reference electrode has the substance
- A$PbO_2 -PbSO_4$
- B$HgCl_2$
- C$AgCl$
- ✓$Hg_2Cl_2$
✓
Answer
Correct option: D.
$Hg_2Cl_2$
d
Reference electrode:-Calomel is one of the most convenient secondary electrodes. The electrode whose potential is arbritarily fixed to a certain value or if it is exactly known as reference electrode.
Reference electrode:-Calomel is one of the most convenient secondary electrodes. The electrode whose potential is arbritarily fixed to a certain value or if it is exactly known as reference electrode.
In Calomel electrode:- A small amount of Mercury is placed at the bottom of the broad tube.
It is then covered with a saturated paste of Mercurous Chloride $\left( Hg _2 Cl _2\right)$ and mercury.
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