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The diagram of Electrochemical cell used for the detection of hydrogen sulphide is given below. Identify the unmarked component.

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The diagram of Electrochemical cell used for the detection of hydrogen sulphide is given below. Identify the unmarked component.

(a) Filter

(b) Gas permeable membrane

(c) Elastic layer

(d) Electrolyte

I got this question in an interview for internship.

My question is taken from H2S Analysers topic in section Industrial Gas Analysers of Analytical Instrumentation

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Correct option is (b) Gas permeable membrane

For explanation: The unmarked component is gas permeable membrane. Electrochemical cell is an electrochemical gas diffusion sensor.

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