Q53 · CSIR NET Chemistry, June 2011
Paper: CSIR NET June 2011 · Subject: Inorganic Chemistry · Chapter: Analytical Chemistry · Topic: Analytical Chemistry – General · Marks: 2 · Difficulty: Easy
The FALSE statement for a polarographic measurement procedure is:
(a)$\mathrm{O}_{2}$ is removed
(b)Dropping mercury electrode is working electrode.
(c)Id is proportional to concentration of electro active species.
(d)Residual current is made zero by adding supporting electrolyte
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
The supporting electrolyte suppresses the migration current, not the residual current; the residual (charging) current remains and is corrected for. The other statements are true.
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