Q. In Saltzman method, which of the following are formed when air containing NO₂ is passed in an absorbing solution consisting of the sulphanilic acid and diamine dissolved in the acetic acid medium?

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Q. NO can be analysed by converting it into NO₂ and passing it through potassium permanganate. Which of the following is the main disadvantage of this method?

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Q. In Jacob-Hochheiser method, NO₂ is passed through a dilute solution of sodium hydroxide forming the nitrite ion. The nitrite ion is reacted with sulphanilamide and ethylene diamine in which of the following to form the highly coloured azo dye?

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Q. Which of the following methods results in the formation of yellow coloured compound?

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Q. Which of the following is the most common application of Chemiluminescence method used for the analysis of Nitrogen oxides?

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Q. Which of the following is the wavelength at which CO laser operates?

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Q. CO laser is operated at liquid nitrogen temperature.

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Q. The chemiluminescence reactor with ozonator is specific to which of the following compounds?

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Q. In which of the following ways can chemiluminescence occur in compounds of nitrogen?

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Q. West-Gaeke colorimetric method is used to analyse oxides of nitrogen.

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Q. Which of the following is the full scale range of Infrared spectroscopy method used for measurement of carbon monoxide?

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Q. Which of the following is the full scale range of Gas chromatography method used for measurement of carbon monoxide?

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Q. Which of the following are not the characteristics of Non-dispersive infrared analyzer method?

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Q. Non-dispersive infrared analyzer depends on the characteristic absorption of the CO molecule at a wavelength of __________

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Q. The zero of the scale is calibrated using which of the following as the sample?

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Q. The disadvantage of Non-dispersive infrared analyzer is that the effect of flow rate is large.

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Q. A stripper column used in gas chromatography, can be used to retain which of the following when an air sample is passed through it?

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Q. Which of the following is not a component of the mixture present in the reference cell of Non-dispersive infrared analyzer?

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Q. Hydrogen flame ionization detector can be used to detect only the peak of CO and not methane.

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Q. CO analyzers based on infrared absorption would give greater sensitivity under which of the following conditions?

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