JNTU
JNTU B.Tech III ANALYTICAL INSTRUMENTATION Previous Question Paper (May - 2019 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
Part A
State the importance of Nernst Equation in pH measurement.
Answer
The Nernst equation establishes the fundamental relationship between the measured potential difference (electromotive force) of the electrode system and the hydrogen ion activity (pH) of the solution. It allows the conversion of millivolt readings from a glass electrode into a precise pH value, expressed as E = E0 - (2.303RT/nF) log[H+].
Describe Chemiluminescence with the help of equations.
Answer
Chemiluminescence is the emission of light resulting from a chemical reaction. The reaction produces an electronically excited intermediate which then decays to the ground state by releasing energy as a photon.
Here, C* represents the excited state species, and hν represents the emitted light.
What do you mean by Adjusted Retention Time in a gas Chromatograph?
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Discuss the purification of the carrier gas in a Gas Chromatograph.
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Define Paramagnetism. Show relative Paramagnetism of various gases graphically.
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State Beer Lambert’s law and briefly explain it.
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Discuss the applications of FTIR.
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Enumerate the two types of Atomizers commonly used in Flame Photometers and their features.
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Define Dead Time in GM Counter.
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What are the resonance conditions for NMR?
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Part B
List out the techniques used for the analysis of H2S gas. Explain any one of them in detail.
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Enumerate the construction and working principle of Silica analyzer with neat figure. Discuss about the sampling system used.
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Show the basic parts of Gas Chromatograph and explain their working in detail.
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Describe the principle of Hartman and Brown Oxygen analyzer.
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What are the advantages of Double Beam instruments? Discuss the Double Beam ratio Recording Spectrophotometers.
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Discuss the sub-questions related to IR and UV-VIS spectroscopy.
Discuss the different types of detectors used in IR Spectrophotometer.
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Differentiate between Single beam and Double beam UV VIS Spectrophotometer.
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Discuss the salient features of FTIR in your own words.
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Explain the principle of an Atomic absorption spectrophotometer and discuss the radiation sources used in it.
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Discuss GM Counter and Mass Spectrometer details.
Justify why the GM tube has limited life span. Explain GM Counter in detail.
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List out the advantages of Quadrupole Mass Spectrometer and explain it.
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Compare nuclear and magnetic resonance instrumentation.
Compare the performance of Ionization chamber, GM Counter and Proportional Counter and comment on your comparison.
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Describe the associated instrumentation with NMR spectrometer and explain the principle of operation of it.
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