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Polarography - Determination of Unknown Concentration of Cadmium

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Which of the following the polarography different from voltammetry?

a: Helps in determining the electrolysis action of solutions of electroreducible substances. Explanation

Explanation

b: The working electrode takes the form of a dropping mercury electrode. Explanation

Explanation

c: All the above. Explanation

Explanation

d: Helps in determining the electrolysis action of solutions of electrooxidisable substances. Explanation

Explanation

Characteristic features of a polarogram is/are

a: Sigmoid in shape Explanation

Explanation

b: Obtained by plotting the current versus potential response. Explanation

Explanation

c: Difference exists between potential of reference electrode and DME. Explanation

Explanation

d: All the above. Explanation

Explanation

Limiting current in polarogram means

a: The sum of the diffusion residual current. Explanation

Explanation

b: Average diffusion current during the life of the drop. Explanation

Explanation

c: The current that exist in between the limiting diffusion plateau and the residual current. Explanation

Explanation

d: Non faradaic current at the foot of the wave. Explanation

Explanation

Ilkovic equation can be best described by the equation:

a: id = 78 n D²⁄³ m³⁄² t²⁄³ c Explanation

Explanation

b: id = 708 n D¹⁄² m²⁄³ t¹⁄⁶ c Explanation

Explanation

c: id = 708 n D²⁄³ m¹⁄² t¹⁄⁶ c Explanation

Explanation

d: id = 78 n D²⁄³ m¹⁄² t¹⁄³ c Explanation

Explanation

In polarographic technique the formation of the new drop is controlled by

a: Auxillary electrode Explanation

Explanation

b: Platinum electrode Explanation

Explanation

c: Polarographic cell Explanation

Explanation

d: Capillary tube Explanation

Explanation

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