By Sunil Bhardwaj


D. Ilkovic performed the number of the experiments on Polarography. In each case, he observed the applied potential and current obtained in galvanometer. In each case, he plotted graph of current V/S applied potential and from graph he calculated id He said if id is known to us we can find out the concentration of experimental solution i.e. quantitative analysis is possible. $$ { i }_{ d } = 607n{ D }^{ 1/2 }{ m }^{ 2/3 }{ t }^{ 1/6 } C $$ \(n =\) Valency of metal
\(D =\) Diffusion coefficient which is constant.
\(m =\) rate of fall of Hg in \(g/sec\).
\(C =\) conc. of electrolyte in \(milli\ moles/{ dm }^{ 3 }\)
\(t =\) average time of fall of Hg drop.
\({ i }_{ d } =\) Diffusion current in \(\mu A\) (micro ampere)
As D depends on temp therefore id depends on temperature.

MCQ on Polarography from Analytical Chemistry
Prof. Gianfranco Coletti

Shared publicly - 2019-08-23 00:00:00

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Prof. Maheshwar Sharon

Shared publicly - 2019-08-24 00:00:00

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to


Shared publicly - 2023-02-28 11:09:52

this is


Shared publicly - 2023-02-28 10:48:10


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