Related InterviewSolutions

• Which of the following is not true about using gas chromatography for measuring pollutants in the air?(a) Pollutants react rapidly in the column(b) Pollutants may not be detected by the detectors(c) Special column and support materials are required(d) Pollutants may elude rapidly from the columnI had been asked this question during an online exam.I'd like to ask this question from Sulphur Di-oxide Monitoring topic in chapter Pollution Monitoring Instruments of Analytical Instrumentation
• 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?(a) Less accuracy(b) Dye formed is unstable(c) Dye formed is colourless(d) Quantity of dye is lowI had been asked this question in a national level competition.This key question is from Estimation of Nitrogen Oxides in chapter Pollution Monitoring Instruments of Analytical Instrumentation
• Sensitivity to total sulphur by Flame-photometric detector is which of the following levels?(a) 0.1 ppm(b) 1 ppm(c) 2 ppm(d) 0.01 ppmI got this question in semester exam.My doubt is from Sulphur Di-oxide Monitoring in chapter Pollution Monitoring Instruments of Analytical Instrumentation
• Given below, is the diagram of Ultraviolet Fluorescence method. Identify the unmarked component.(a) Filter(b) Electronic circuit(c) Supply(d) Fluorescence chamberI got this question in an international level competition.I'm obligated to ask this question of Sulphur Di-oxide Monitoring topic in portion Pollution Monitoring Instruments of Analytical Instrumentation
• Flame ionization detectors are sensitive to which of the following gases?(a) Carbon dioxide(b) Methane(c) Carbon monoxide(d) Sulphur dioxideThe question was posed to me in final exam.This interesting question is from Estimation of Hydrocarbons in division Pollution Monitoring Instruments of Analytical Instrumentation
• Which of the following is not the characteristic of flame ionization detector?(a) Good linearity(b) Narrow range of concentration(c) High sensitivity(d) Fast responseThe question was asked during an interview for a job.Origin of the question is Estimation of Hydrocarbons in chapter Pollution Monitoring Instruments of Analytical Instrumentation
• 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?(a) Sodium tetra chloromercurate(b) Dicholorosulphitomercurate complex(c) Ammonia molybdate(d) Paraosaniline sulphonic acidThis question was addressed to me during a job interview.My doubt stems from Sulphur Di-oxide Monitoring in division Pollution Monitoring Instruments of Analytical Instrumentation
• The zero of the scale is calibrated using which of the following as the sample?(a) Air(b) Water(c) Inert gas(d) Pure nitrogenI got this question by my school principal while I was bunking the class.The above asked question is from Estimation of Carbon Monoxide in section Pollution Monitoring Instruments of Analytical Instrumentation
• The conductivitimetry method, involves bubbling sulphur dioxide through a solution containing sulphuric acid and which of the following?(a) Water(b) Hydrogen peroxide(c) Iodine(d) FormaldehydeThis question was addressed to me in exam.Question is taken from Sulphur Di-oxide Monitoring topic in portion Pollution Monitoring Instruments of Analytical Instrumentation
• Non-dispersive infrared analyzer depends on the characteristic absorption of the CO molecule at a wavelength of __________(a) 5.4 µm(b) 4.6 µm(c) 8.9 µm(d) 10.8 µmI got this question during an internship interview.My doubt is from Estimation of Carbon Monoxide topic in division Pollution Monitoring Instruments of Analytical Instrumentation