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.