IGNOU MCH 3 SOLVED ASSIGNMENT

Ques 1.

What is wave number? How is it related to wavelength?

Ques 2.

What is unpolarised light? How can it be polarised?

Ques 3.

Calculate the absorbance and transmittance of a 0.002 40 M solution of a substance having a molar absorptivity of 313 M¹ cm²¹ in a cell with a path length of 2.00 cm.

Ques 4.

The UV-VIS spectrum in gaseous phase is observed to be a band spectrum whereas in solution phase it is a smooth and continuous absorption peak. Explain.

Ques 5.

Discuss the factors responsible for the deviation from Lambert-Beer's law.

Ques 6.

What is the role of a detector in a spectrophotometer? Explain the principle of photomultiplier tube as a detector.

Ques 7.

Describe is KBr pelleting method for handling solid samples in IR spectroscopy.

Ques 8.

Calculate the number of vibrational modes for a molecule of methane.

Ques 9.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 10.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 11.

Discuss different modes of relaxation for an electronically excited molecule using the Jablonski diagram. 

Ques 12.

 Discuss different factors affecting fluorescence.

Ques 13.

 Discuss different factors affecting fluorescence.

Ques 14.

Discuss the fate of a sample introduced in the flame.

Ques 15.

Discuss the merits and demerits of Flame photometric method.

Ques 16.

 Enlist different pathways for atomic fluorescence emission and explain Stokes direct line fluorescence method.

Ques 17.

The choice of proper reagents and techniques of decomposition and dissolution of the sample is a critical step for the success of AAS determination. Explain the preparing sample for AAS using microwave digestion system.

Ques 18.

List the characteristics of an ideal atomization-excitation source.

Ques 19.

Draw a schematic layout of different components of an ICP-AES spectrometer and briefly state the role of each component.

Ques 20.

 Explain different relaxation mechanisms by which these operate to maintain population difference in nuclear spin states in NMR.

Ques 21.

What are isotopic peaks? Discuss the importance of isotopic peaks in mass spectrometry.

Ques 22.

 The important spectral details of an organic molecule having a molecular formula C4H8O are as follows:

Ques 23.

What is wave number? How is it related to wavelength?

Ques 24.

What is unpolarised light? How can it be polarised?

Ques 25.

Calculate the absorbance and transmittance of a 0.002 40 M solution of a substance having a molar absorptivity of 313 M¹ cm²¹ in a cell with a path length of 2.00 cm.

Ques 26.

The UV-VIS spectrum in gaseous phase is observed to be a band spectrum whereas in solution phase it is a smooth and continuous absorption peak. Explain.

Ques 27.

Discuss the factors responsible for the deviation from Lambert-Beer's law.

Ques 28.

What is the role of a detector in a spectrophotometer? Explain the principle of photomultiplier tube as a detector.

Ques 29.

Describe is KBr pelleting method for handling solid samples in IR spectroscopy.

Ques 30.

Calculate the number of vibrational modes for a molecule of methane.

Ques 31.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 32.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 33.

Discuss different modes of relaxation for an electronically excited molecule using the Jablonski diagram. 

Ques 34.

 Discuss different factors affecting fluorescence.

Ques 35.

 Discuss different factors affecting fluorescence.

Ques 36.

Discuss the fate of a sample introduced in the flame.

Ques 37.

Discuss the merits and demerits of Flame photometric method.

Ques 38.

 Enlist different pathways for atomic fluorescence emission and explain Stokes direct line fluorescence method.

Ques 39.

The choice of proper reagents and techniques of decomposition and dissolution of the sample is a critical step for the success of AAS determination. Explain the preparing sample for AAS using microwave digestion system.

Ques 40.

List the characteristics of an ideal atomization-excitation source.

Ques 41.

Draw a schematic layout of different components of an ICP-AES spectrometer and briefly state the role of each component.

Ques 42.

 Explain different relaxation mechanisms by which these operate to maintain population difference in nuclear spin states in NMR.

Ques 43.

What are isotopic peaks? Discuss the importance of isotopic peaks in mass spectrometry.

Ques 44.

 The important spectral details of an organic molecule having a molecular formula C4H8O are as follows:

Ques 45.

What is wave number? How is it related to wavelength?

Ques 46.

What is unpolarised light? How can it be polarised?

Ques 47.

Calculate the absorbance and transmittance of a 0.002 40 M solution of a substance having a molar absorptivity of 313 M¹ cm²¹ in a cell with a path length of 2.00 cm.

Ques 48.

The UV-VIS spectrum in gaseous phase is observed to be a band spectrum whereas in solution phase it is a smooth and continuous absorption peak. Explain.

Ques 49.

Discuss the factors responsible for the deviation from Lambert-Beer's law.

Ques 50.

What is the role of a detector in a spectrophotometer? Explain the principle of photomultiplier tube as a detector.

Ques 51.

Describe is KBr pelleting method for handling solid samples in IR spectroscopy.

Ques 52.

Calculate the number of vibrational modes for a molecule of methane.

Ques 53.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 54.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 55.

Discuss different modes of relaxation for an electronically excited molecule using the Jablonski diagram. 

Ques 56.

 Discuss different factors affecting fluorescence.

Ques 57.

 Discuss different factors affecting fluorescence.

Ques 58.

Discuss the fate of a sample introduced in the flame.

Ques 59.

Discuss the merits and demerits of Flame photometric method.

Ques 60.

 Enlist different pathways for atomic fluorescence emission and explain Stokes direct line fluorescence method.

Ques 61.

The choice of proper reagents and techniques of decomposition and dissolution of the sample is a critical step for the success of AAS determination. Explain the preparing sample for AAS using microwave digestion system.

Ques 62.

List the characteristics of an ideal atomization-excitation source.

Ques 63.

Draw a schematic layout of different components of an ICP-AES spectrometer and briefly state the role of each component.

Ques 64.

 Explain different relaxation mechanisms by which these operate to maintain population difference in nuclear spin states in NMR.

Ques 65.

What are isotopic peaks? Discuss the importance of isotopic peaks in mass spectrometry.

Ques 66.

 The important spectral details of an organic molecule having a molecular formula C4H8O are as follows:

Ques 67.

What is wave number? How is it related to wavelength?

Ques 68.

What is unpolarised light? How can it be polarised?

Ques 69.

Calculate the absorbance and transmittance of a 0.002 40 M solution of a substance having a molar absorptivity of 313 M¹ cm²¹ in a cell with a path length of 2.00 cm.

Ques 70.

The UV-VIS spectrum in gaseous phase is observed to be a band spectrum whereas in solution phase it is a smooth and continuous absorption peak. Explain.

Ques 71.

Discuss the factors responsible for the deviation from Lambert-Beer's law.

Ques 72.

What is the role of a detector in a spectrophotometer? Explain the principle of photomultiplier tube as a detector.

Ques 73.

Describe is KBr pelleting method for handling solid samples in IR spectroscopy.

Ques 74.

Calculate the number of vibrational modes for a molecule of methane.

Ques 75.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 76.

Explain the origin of Rayleigh and Raman lines with the help of an energy level diagram.

Ques 77.

Discuss different modes of relaxation for an electronically excited molecule using the Jablonski diagram. 

Ques 78.

 Discuss different factors affecting fluorescence.

Ques 79.

 Discuss different factors affecting fluorescence.

Ques 80.

Discuss the fate of a sample introduced in the flame.

Ques 81.

Discuss the merits and demerits of Flame photometric method.

Ques 82.

 Enlist different pathways for atomic fluorescence emission and explain Stokes direct line fluorescence method.

Ques 83.

The choice of proper reagents and techniques of decomposition and dissolution of the sample is a critical step for the success of AAS determination. Explain the preparing sample for AAS using microwave digestion system.

Ques 84.

List the characteristics of an ideal atomization-excitation source.

Ques 85.

Draw a schematic layout of different components of an ICP-AES spectrometer and briefly state the role of each component.

Ques 86.

 Explain different relaxation mechanisms by which these operate to maintain population difference in nuclear spin states in NMR.

Ques 87.

What are isotopic peaks? Discuss the importance of isotopic peaks in mass spectrometry.

Ques 88.

 The important spectral details of an organic molecule having a molecular formula C4H8O are as follows:

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