Q.1
Which of the following is not true about the galvanic method of oxygen analysis?
  • a) Electrodes are composed of noble and base metals
  • b) It can measure dissolved content of oxygen
  • c) Its principle is based on electrolysis
  • d) It utilizes an electronic cell
Q.2
Which of the following is true about Hersch cell which is one of the arrangements of a galvanic cell?
  • a) Cell is spherical in shape
  • b) Cathode is made of porous material
  • c) Cathode is placed centrally
  • d) Cathode is formed by gauze which surrounds the anode
Q.3
Polarographic cells type of electrochemical method uses which of the following concepts?
  • a) Cyclic reactions
  • b) Exothermic reactions
  • c) Reversible reactions
  • d) Redox reactions
Q.4
Which of the following methods, is the widely used method for trace gas analysis?
  • a) Galvanic methods
  • b) Conductometric method
  • c) Polarographic cells
  • d) Thermal conductivity method
Q.5
In the conductometric method, the difference in gas conductivity before and after passing sample gas denotes which of the following?
  • a) Efficiency of the cell
  • b) Quantity of reagent
  • c) Concentration of gas
  • d) Density of the reagent
Q.6
Conductometric method is not very suitable for measuring traces of which of the following gases in ppb range?
  • a) H2S
  • b) SO2
  • c) NH3
  • d) CO
Q.7
Polarographic cells are not sensitive to which of the following gases?
  • a) Carbon monoxide
  • b) Carbon dioxide
  • c) Nitrous oxide
  • d) Oxygen
Q.8
In polarographic cell when potential is applied, oxygen is reduced at __________ when KCl is present.
  • a) Anode
  • b) Cathode
  • c) Electrolyte
  • d) Both the electrode
Q.9
Polarographic cells are used to measure the partial pressure of gases only in static gas monitoring systems and not in continuous streams.
  • a) True
  • b) False
Q.10
Polarographic cells used for measuring the partial pressure of oxygen are temperature-sensitive.
  • a) True
  • b) False
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