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SSC Steno Grade C and D 29 Dec 2013 Paper
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Question :
88 of 200
Marks:
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Nitrogen dioxide present in ambient air can be estimated by
Flame photometry
Atomic absorption spectrophotometry
High performance liquid chromatography
Chemi-luminescene
Validate
Solution:
4) Concentrations of nitrogendioxide (NO2) in ambient airare determined indirectly byphotometrically measuring thelight intensity, at wavelengthsgreater than 600 nm, resultingfrom the chemiluminescentreaction of nitric oxide (NO)with ozone (O3).
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