Multiple Choice Questions (Instrumentation)

1. Atomic Absorption Spectroscopy is used  for the analysis of:

1. Solvents
2. Non-Metallic Elements
3. Metallic Elements
4. Volatile Elements

2. In Neutron Activation Analysis the sample is bombarded with:

1. Alpha Radiation
2. Beta Radiation
3. UV Radiation
4. Neutrons

3. The deviation in Beer-Lambert Law in Absorption Spectroscopy becomes evident at:

1. Low Concentration of absorbing molecule
2. Lower pH ionic strength
3. High concentration of absorbing molecule
4. Lower Refractive index absorbing molecules

4. Potentiometry and Colorimetry are the techniques named as:

1. Optical Technique
2. Iso-electrical Technique
3. Chemical Technique
4. Electro-Chemical Technique

5. The most important factor affecting the mobility of that molecule in electrophoresis depends on the:

1. Strength of the electrical field
2. Net charge, size and shape of a molecule
3. Ionic strength of the buffer
4. Increasing pore size

6. The most common detector used in HPLC equipment is:

1. UV Detector
2. Fluorescence Detector
3. PMT Detector
4. Electro chemical Detector

7. The non-destructive technique for identification and quantitative analysis in Trace Metal Composition is:

1. Spectrographic analysis
2. Atomic Absorption Spectroscopy
3. Neutron Activation Analysis
4. Pyrolysis Gas Chromatogaphy

8. The intensity of the fundamental vibrational absorption band is:

1. Proportional to rate of change dipole moment with respect to displacement of atom
2. Proportional to the square of the rate of change dipole moment with respect to displacement of atom
3. Proportional to the change dipole moment with respect to displacement of atom
4. Independent of any of such change as above

9. A difference in the indices of refraction exhibited by some crystalline materials is called:

1. Double Refractive Index
2. Reflection
3. Refraction
4. Birefringence

10. X-Ray Diffraction is a diffraction technique, which is not applicable for?

1. To identify the atomic and molecular structure of a crystal
2. To identify the Birefringence properties of the crystals
3. To observe the Density of an electron within the crystal
4. To obtain the crystalline symmetry.

11. Karl Pearson’s Coefficient is the method:

1. For studying linear correlation between two variables
2. For calculating probability
3. For sampling of reliable data
4. For studying correlation and calculating probability

12. Minimum magnification required for examination of fibre in currency notes:

1. 10-40X
2. 20-40X
3. 40-60X
4. 100-200X

13. The most suitable forensic technique for polymer fibre-content anlaysis is:

1. X-Ray Diffraction
2. Pyrolysis Gas Chromatography
3. Emission Spectrography
4. Atomic Absorption Spectrophotometry

14. Which of the following technique is used to compare Trace Elements found in soil?

1. Spectrographic Analysis
2. Density Gradient
3. Microscopic Examination
4. Flame Test

15. Which is one of the greatest methods for Fiber examination?

1. Density Gradient Method
2. Fourier Transform infrared spectroscopy
3. Float Test
4. Flame Test

Answer:

1. Metallic Elements
2. Neutrons
3. High concentration of absorbing molecule
4. Electro-Chemical Technique
5. Net charge, size and shape of a molecule
6. UV Detector
7. Neutron Activation Analysis
8. Proportional to the square of the rate of change dipole moment with respect to displacement of atom
9. Birefringence
10. To identify the Birefringence properties of the crystals
11. For studying linear correlation between two variables
12. 40-60X
13. Pyrolysis Gas Chromatography
14. Spectrographic Analysis
15. Fourier Transform infrared spectroscopy