NO2 Analyser MCQ

Test your knowledge with important NO2 Analyser MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more NO2 Analyser MCQs on Bissoy. Bissoy App

• To monitor oxides of nitrogen in stack effluents, the sample containing oxides of nitrogen is passed through a flask containing solution of H2O2 in sulphuric acid. Nitric acid is formed. The nitrate ions then react with phenol-disulphonic acid to produce blue colour.
  ক

  True

  খ

  False
• In Laser Opto-acoustic spectroscopy, the IR beam excites the molecules to higher states. In which of the following ways do the molecules return to the ground state?
  ক

  Collisional de-excitation

  খ

  Random de-excitation

  গ

  By spontaneous emission

  ঘ

  By stimulated emission
• A pink coloured dye complex is formed when air containing NO2 is passed in an absorbing solution consisting of __________ and diamine dissolved in the acetic acid medium.
  ক

  Sulphuric acid

  খ

  Sulphonyl

  গ

  Sulphonic acid

  ঘ

  Sulphanilic acid
• Which of the following analyzers are used to measure trace amounts of nitrogen oxides in the stratosphere?
  ক

  Chemiluminescence

  খ

  CO laser method

  গ

  Laser opto-acoustic spectroscopy

  ঘ

  Colorimetry
• Which of the following detectors are generally used for detection in NO analysis using CO laser?
  ক

  Photomultiplier tube

  খ

  Photovoltaic cell

  গ

  Liquid nitrogen cooled Ge-Au element

  ঘ

  Photo emissive tube
• How can absorption be enhanced while determining NO concentration using CO laser?
  ক

  By converting NO into NO2

  খ

  By placing NO in a magnetic field

  গ

  By using proper monochromators

  ঘ

  By using choppers
• The instruments based on chemiluminescence maintain linearity in which of the following ranges?
  ক

  1ppb to 100ppb

  খ

  100ppb to 1000ppb

  গ

  1ppb to 1000ppb

  ঘ

  100ppb to 1000ppb
• The block diagram for parallel mode analyser of NO and NO2 is given below. Identify the unmarked block in the diagram.
  ক

  NO Analyser

  খ

  NO2 to NO reduction

  গ

  NO2 remover

  ঘ

  Difference
• The block diagram of series mode analyser of NO and NO2 is given below. Identify the unmarked procedure.
  ক

  Oxidiser

  খ

  Reducer

  গ

  Filter

  ঘ

  NO Analyser
• During analysis of NO2 using Chemiluminescent analyser, why is NO2 not made to react with ozone directly?
  ক

  Less accuracy

  খ

  It is a slow process

  গ

  It leads to contamination of the sample

  ঘ

  It does not produce luminescence
• How is NO converted to NO2 for analysis in Chemiluminescent analyser?
  ক

  Treating sample gas with pressurized oxygen

  খ

  Treating sample gas with ozone

  গ

  Treating sample gas with oxygen at low pressure

  ঘ

  Treating sample gas with water at high pressure
• How is NO converted to NO2 for analysis in UV and Visible analyzers?
  ক

  Treating sample gas with pressurized oxygen

  খ

  Treating sample gas with ozone

  গ

  Treating sample gas with oxygen at low pressure

  ঘ

  Treating sample gas with water at high pressure
• Nitrogen oxide cannot be directly analysed using UV and Visible analyzers due to which of the following reasons?
  ক

  Less accuracy

  খ

  Very low range

  গ

  It leads to contamination of the sample

  ঘ

  It is transparent in UV visible regions
• Nitrogen dioxide can be detected with a paramagnetic analyser.
  ক

  True

  খ

  False