The cathode used in polarography is
Question and options
The cathode used in polarography is
- DME
- Hg pool
- Pt electrode
- Zinc electrode
Answer and explanation
Correct answer: A - DME
In polarography the working cathode is the dropping mercury electrode (DME), giving a constantly renewed surface and high hydrogen overvoltage. A mercury pool usually serves as the large non-polarisable anode, not the working cathode.
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