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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 cellI have been asked this question in an online interview.My doubt stems from Electrochemical Methods for Oxygen Analysis in section Industrial Gas Analysers of Analytical Instrumentation

Answer»

Right OPTION is (c) Its principle is BASED on electrolysis

Explanation: Galvanic method of oxygen ANALYSIS is based on the reverse of electrolysis. In this method, the electrical CURRENT developed is related to the rate of oxygen uptake by the cell.



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