Which of the following could be used as the layer of dielectric in interference filters used in Absorption Spectroscopy?
A. Graphite
B. MgF2
C. Fe
D. AgNO3
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In Atomic Absorption Spectroscopy, with what material is the cathode in Hollow cathode lamp constructed?
A. Tungsten
B. Quartz
C. Element to be investigated
D. Aluminium
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Atomic absorption spectroscopy is also called as Absorption Flame Photometry.
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Transmittance is given as T = P o P . If Po is the power incident on the sample, what does P represent?
A. Radiant power transmitted by the sample
B. Radiant power absorbed by the sample
C. Sum of powers absorbed and scattered
D. Sum of powers transmitted and reflected
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How is the wave number of electromagnetic radiation related to wavelength?
A. It is the reciprocal of wavelength
B. It is directly proportional to wavelength
C. It is not related to wavelength
D. It is equal to wavelength
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In Flame emission photometers, the measurement of . . . . . . . . is used for qualitative analysis.
A. Colour
B. Intensity
C. Velocity
D. Frequency
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What is the unit of absorbance which can be derived from Beer Lambert's law?
A. L mol-1 cm-1
B. L gm-1 cm-1
C. Cm
D. No unit
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Match the items in
Group I with
Group II .
Group I
Group II
P. Circular dichroism
1. Concentration
Q. X-ray crystallography
2. Sedimentation coefficient
R. Freeze-drying
3. Secondary structure determination
S. Ultracentrifugation
4. Tertiary structure determination
A. P-4, Q-1, R-2, S-3
B. P-1, Q-4, R-3, S-2
C. P-2, Q-3, R-4, S-1
D. P-3, Q-4, R-1, S-2
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Bolometer, a type of detector, is also known as . . . . . . . .
A. Resistance temperature detector (RTD)
B. Thermistor
C. Thermocouple
D. Golay cell
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To tolerate high operating temperatures, which of the following has to be done in incandescent or tungsten filament lamps?
A. Alloys must be used
B. Nitrogen be used instead of inert gas
C. Envelope is fabricated with quartz
D. Envelope is fabricated with copper
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The helix content of a protein can be determined using
A. An infrared spectrometer
B. A fluorescence spectrometer
C. A circular dichroism spectrometer
D. A UV-Visible spectrophotometer
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How can the intensity of radiation be increased in Hollow cathode lamp?
A. Addition of non-conductive protective shield of mica
B. Addition of nitrogen to neon or argon in the lamp
C. Increasing the pressure of the filling gas
D. Changing the metal of the anode
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Tertiary structure of a protein consisting of α-helices and β-strands can be determined by
A. Circular dichroism spectroscopy
B. Mass spectrometry
C. Nuclear magnetic resonance spectroscopy
D. UV spectroscopy
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Which of the following is the advantage of grating monochromators?
A. Dispersion is non-overlapping
B. Dispersion occurs in non-linear manner
C. Dispersion is overlapping
D. Dispersion occurs in a linear manner
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In Atomic Absorption Spectroscopy, which of the following is the generally used radiation source?
A. Tungsten lamp
B. Xenon mercury arc lamp
C. Hydrogen or deuterium discharge lamp
D. Hollow cathode lamp
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Which of the following is not a technique for preparing solid samples in IR spectroscopy?
A. Solids run in solution
B. Mull technique
C. Solid films
D. Thin films
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Which of the following options are correct in terms of wavelength for the different types of IR spectrometer?
A. Near IR: 0.8 - 2.5 mm
B. Mid IR: 0.8 - 2.5 mm
C. Far IR: 2.5 - 50 mm
D. Mid IR: 50 - 100 mm
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Which of the following is the principle of Atomic Absorption Spectroscopy?
A. Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
B. Medium absorbs radiation and transmitted radiation is measured
C. Colour is measured
D. Colour is simply observed
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In the most widely used beam splitter, a thin film of . . . . . . . . is sandwiched between two plates of low refractive index solid. Fill the blank with a suitable option.
A. Mylar
B. Silicon carbid
C. Ferrous oxide
D. Silver chloride
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Laminar flow burner used in Flame photometers is also known as . . . . . . . .
A. Turbulent burner
B. Premix burner
C. Total consumption burner
D. Nozzle mix burner
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