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MCQ on polarography: Page-4

All of the following are used as working electrodes in voltammetry, except
zinc

(A) P,S

(B) Q,S

(C) P

(D) R

The diffusion current is measured in late life period of mercury drop in

(A) Pulsed polarography

(B) Differential pulsed polarography

(C) Tast polarography

(D) Voltammetry

The diffusion current in the polarography depends on all of the following, EXCEPT

(A) Capillary diameter

(B) Life time of mercury drop

(C) Temperature

(D) Charge of the electrolyte

The amount of the supporting electrolyte added to sample solution in polarography is
one-tenth

(A) P,S

(B) Q,S

(C) P,R

(D) Q,R

The auxillary electrode in polarography is

(A) Dropping mercury

(B) Mercury pool

(C) Graphite electrode

(D) Rotating platinum electrode