Pollution Monitoring Instruments(Analytical Instrumentation ) Questions and Answers

Question 1. The conductivitimetry method, involves bubbling sulphur dioxide through a solution containing sulphuric acid and which of the following?
  1.    Water
  2.    Hydrogen peroxide
  3.    Iodine
  4.    Formaldehyde
Explanation:-
Answer: Option B. -> Hydrogen peroxide
Answer: (b).Hydrogen peroxide
Question 2. In West-Gaeke colourimetric procedure, the intensity of the red purple colour is measured photometically and it is proportional to the concentration of sulphur dioxide. What is the red purple coloured compound?
  1.    Sodium tetra chloromercurate
  2.    Dicholorosulphitomercurate complex
  3.    Ammonia molybdate
  4.    Paraosaniline sulphonic acid
Explanation:-
Answer: Option D. -> Paraosaniline sulphonic acid
Answer: (d).Paraosaniline sulphonic acid
Question 3. Which of the following are not the characteristics of colorimetry method used to monitor sulphur dioxide?
  1.    It is simple
  2.    It has high sensitivity
  3.    It has good specificity
  4.    It is affected by interference from H₂SO₄, SO₃, NH₃, etc
Explanation:-
Answer: Option D. -> It is affected by interference from H₂SO₄, SO₃, NH₃, etc
Answer: (d).It is affected by interference from H₂SO₄, SO₃, NH₃, etc
Question 4. Which of the following are not the characteristics of conductivitimetry method used to measure sulphur dioxide?
  1.    Fast response
  2.    High sensitivity
  3.    Free from interference by other gases
  4.    Good accuracy
Explanation:-
Answer: Option C. -> Free from interference by other gases
Answer: (c).Free from interference by other gases
Question 5. Which of the following is not true about using gas chromatography for measuring pollutants in the air?
  1.    Pollutants react rapidly in the column
  2.    Pollutants may not be detected by the detectors
  3.    Special column and support materials are required
  4.    Pollutants may elude rapidly from the column
Explanation:-
Answer: Option D. -> Pollutants may elude rapidly from the column
Answer: (d).Pollutants may elude rapidly from the column
Question 6. Which of the following is the most abundant hydrocarbon which is emitted into the atmosphere by biological activity?
  1.    Ethane
  2.    Methane
  3.    Poly Aromatic hydrocarbons
  4.    Pentane
Explanation:-
Answer: Option B. -> Methane
Answer: (b).Methane
Question 7. Propane would give three times the intensity of response as compared to methane.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 8. How can carbon monoxide be detected using flame ionization detectors while using gas chromatography technique?
  1.    By converting it into carbon dioxide
  2.    By converting it into methane
  3.    By mixing it with combustible gases
  4.    It cannot be detected
Explanation:-
Answer: Option B. -> By converting it into methane
Answer: (b).By converting it into methane
Question 9. Which of the following organic compounds will have the highest intensity of response when introduced in a flame ionization detector?
  1.    Methane
  2.    Ethane
  3.    Propane
  4.    Butane
Explanation:-
Answer: Option D. -> Butane
Answer: (d).Butane
Question 10. Flame ionization detectors are sensitive to which of the following gases?
  1.    Carbon dioxide
  2.    Methane
  3.    Carbon monoxide
  4.    Sulphur dioxide
Explanation:-
Answer: Option B. -> Methane
Answer: (b).Methane
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