Solve your IGNOU Doubts
Solve your IGNOU Doubts
Question:

What is solid state membrane electrode? Draw a sketch diagram and describe their applications.

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Question:

Describe various factors that cause errors in pH measurement.

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Question:

What do you understand by cell potential? Calculate the potential of following
electrodes:
i) A copper electrode immersed in 0.022\, M\, Cu(NO_{3})_{2}
ii) A zinc electrode immersed in 0.030\: M\: Zn(NO_{3})_{2}

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Question:

Draw all the spectra possible for the molecule of benzoic acid indicating the peak values for each of the spectrum.

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Question:

Taking a suitable example. Explain the fragmentation due to intermolecular rearrangement in mass spectrometry.

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Question:

Draw the NMR spectra of methylisopropyl ketone showing the  values of all the photons.

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Question:

Explain the terms, magnetogyric ratio, spin flip, Fourier transformation, chemical shift and coupling constant.

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Question:

Describe the application of AAS in the determination of toxic elements present as environmental contaminants.

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Question:

Describe plasma as used in AES. Give an example and write the principle of AEC based on plasma sources.

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Question:

What is the difference between a premix nabuliser-burner and a total consumption burner? Give the advantage of flame atomization method.

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Question:

What is the reason of nonlinearity in the AAS plot? What other factors are responsible for this? Explain how these are resolved for an analyte.

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Question:

What is the advantage of Stokes fluorescence? Explain taking an example and illustrate your answer.

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Question:

Describe the processes that occur in the flame during a flame photometric experiment.

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Question:

Describe in brief the basic principles involved in atomic absorption spectrometry (AAS) atomic emission spectrometry (AES) and atomic fluorescence spectrometry (AFS).

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Question:

How is NO-NO_{2} determined as atmospheric pollutants by fluorimetry? Describe the method

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Question:

What is meant by fluorescence quenching? Explain the mechanism responsible for the quenching?

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Question:

Describe the phenomena of fluorescence and phosphorescence using the Jablonski diagram.

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Question:

Differentiate between IR spectra and Raman spectra.

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Question:

Why is the handling of samples for IR spectra measurements is not simple? Describe the sampling of solids for IR spectral measurements.

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Question:

What is the significance of selection rules for the vibrational spectroscopy? Describe the types of signals obtained in the vibration spectrum of a diatomic molecule.

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