JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year ANALYTICAL INSTRUMENTATION Previous Question Paper (December-2023/January-2024 - R15)
Question paper consists of Part A, Part B. Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
List out the considerations that govern the design of pH meters.
Answer
The design of pH meters is governed by the need for high input impedance to prevent loading the glass electrode, temperature compensation mechanisms to account for Nernstian slope variations, and high stability/low drift circuitry to maintain measurement accuracy.
What are the drawbacks of Beer Lambert’s law?
Answer
Drawbacks include deviations at high concentrations due to electrostatic interactions, chemical reactions such as association or dissociation of the analyte, stray light interference, and the requirement for monochromatic radiation which is difficult to achieve perfectly.
Write down the steps for calibration of Paramagnetic Oxygen analyzer.
Answer
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Describe Retention measurement in GC.
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List the applications of IR Spectrometer.
Answer
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Explain the principle of operation of Photo Multiplier Tube.
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Define Calorific Value.
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What is an Atomizer? Explain its working.
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Define Chemical Shift in NMR.
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Discuss the applications of Nuclear Radiation detectors.
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Part B
Enumerate the construction and working principle of Silica analyzer with neat figure.
Answer
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How can the zero stability of a direct coupled amplifier are improved. Name the circuit and explain it.
Answer
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Discuss the use of density of a gas to analyze it. Name the gases that use this principle for analysis. Explain Gas density analyzer.
Answer
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What is the necessity of involving Temperature programming in a Chromatograph? Explain Temperature programming with neat figure.
Answer
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Discuss the baseline compensation in dual FID arrangement.
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Draw the circuit diagram of Katharometer Cell and explain it
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Describe the operation of Gas chromatograph briefly.
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Explain the working principle of Double beam UV-VIS Spectrophotometer.
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Draw and explain IR gas analyzers for the detection of hydrocarbons.
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Discuss different sources of flame photometers.
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What is a Monochromator? Discuss the monochromator in UV-VIS Spectrophotometer.
Answer
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Explain the principle of an Atomic absorption spectrophotometer and discuss the radiation sources used in it.
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Explain the basic principle of operation of Mass Spectrophotometer with neat figure.
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Draw the graph showing the variation of the Count rate with voltage in GM counter and analyze it.
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With neat schematic explain the working of Proportional Counter.
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List out the advantages of Quadrupole Mass Spectrometer and explain it.
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