Voltammetry

The output of a voltammetric analysis of an electroactive analyte is

• Current time curve

• Charge time curve

• Current potential curve

• Charge temperature curve

Which of the following is not true about the galvanic method of oxygen analysis?

• Electrodes are composed of noble and base metals

• It can measure dissolved content of oxygen

• Its principle is based on electrolysis

• It utilizes an electronic cell

Tags

NGSS.HS-PS2-5

Which of the following methods, is the widely used method for trace gas analysis?

• Galvanic methods

• Conductometric method

• Polarographic cells

• Thermal conductivity method

The auxiliary electrode in polarography is

• Dropping mercury

• Mercury pool

• Graphite electrode

• Rotating platinum electrode

Which of the following is true about Hersch cell which is one of the arrangements of a galvanic cell?

• Cell is spherical in shape

• Cathode is made of porous material

• Cathode is placed centrally

• Cathode is formed by gauze which surrounds the anode

Polarographic cells type of electrochemical method uses which of the following concepts?

• Cyclic reactions

• Exothermic reactions

• Reversible reactions

• Redox reactions

In the conductometric method, the difference in gas conductivity before and after passing sample gas denotes which of the following?

• Efficiency of the cell

• Quantity of reagent

• Concentration of gas

• Density of the reagent

Polarographic cells are not sensitive to which of the following gases?

• Carbon monoxide

• Carbon dioxide

• Nitrogen oxide

• Oxygen

In polarographic cell when potential is applied, oxygen is reduced at __________ when KCl is present.

• Anode

• Cathode

• Electrolyte

• Both the electrode

Tags

NGSS.HS-PS2-5

Polarographic cells are used to measure the partial pressure of gases only in static gas monitoring systems and not in continuous streams.

• True

• False