The block diagram for parallel mode analyser of NO and NO2 is given below. Identify the unmarked block in the diagram.(a) NO Analyser(b) NO2 to NO reduction(c) NO2 remover(d) DifferenceThe question was asked during an internship interview.I need to ask this question from NO2 Analyser in portion Industrial Gas Analysers of Analytical Instrumentation

The block diagram for parallel mode analyser of NO and NO2 is given be

1.	The block diagram for parallel mode analyser of NO and NO2 is given below. Identify the unmarked block in the diagram.(a) NO Analyser(b) NO2 to NO reduction(c) NO2 remover(d) DifferenceThe question was asked during an internship interview.I need to ask this question from NO2 Analyser in portion Industrial Gas Analysers of Analytical Instrumentation
Answer» Correct choice is (d) Difference For explanation I would say: The UNMARKED block is Difference. Difference between the CONCENTRATION of NO2 and NO and the concentration of NO2 alone is determined and the RESULT GIVES the concentration of NO.

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