Question 1: which of these molecule will absorb infrared radiation?
A. Molecule with permanent dipole
B. Molecule with conjugation
C. Molecule with ring structures
D. Molecules with long pair of electron
The answer is A. Molecule with permanent dipole
Question 2: when a molecule absorbs infrared radiation it experiences____?
A. Vibrational transition
B. Molecular transition
C. Electronic transition
D. Quantization
The answer is A. Vibrational transition
Question 3: In which spectroscopic technique is it that radiation is absorbed by excited gaseous atoms?
A. Infrared spectroscopy
B. UV-Visible spectroscopy
C. Atomic absorption spectroscopy
D. Nuclear magnetic resonance spectroscopy
The answer is C. Atomic absorption spectroscopy
Question 4:_____ is used to determine the concentration of an analyte when concentration is unknown
A. Wavelength
B. Calibration curve
C. Absorption maximum
D. Frequency
Question 5: The radiation produced by an analyte of interest if it were to undergo electronic transition is the source of radiation in ___ spectroscopy?
A. Infrared
B. Nuclear magnetic resonance spectroscopy
C. UV-Visible spectroscopy
D. Atomic absorption spectroscopy
The answer is D. Atomic absorption spectroscopy
Question 6: in atomic absorption the number of absolutely ground state atom in flame is ____?/
A. Proportional to the concentration of the atom in the flame
B. Inversely proportional to the concentration of the atoms in flame
C. Equal to the cube root of the concentration of the atoms in flame
D. Equal to the cube square of the concentration of the atoms in flame
The answer is A. Proportional to the concentration of the atom in the flame
Question 7: _____ is a plot of the absorbance of different concentrations of the compound being determined against their Concentrations.
A. Absorption maximum
B. Frequency
C. Transmittance
D. Calibrated curve
The answer is D. Calibrated curve
Question 8: in colorimetry, the amount of visible radiation absorbed by a coloured analyte is ___?
A. Inversely related to its concentration
B. Related to the square root of its Concentration
C. Related to its concentration
D. Related to the cube root of its concentration
The answer is C. Related to its concentration
Question 9: ______ is a graph of infrared light absorbance or transmittance against frequency or wavelength
A. Infrared group frequencies
B. Infrared spectrum
C. Infrared finger print region
D. Infrared band
The answer is B infrared spectrum
Question 10: The radiation produced by an analyte of interest if it were to undergo electronic transition is the source of radiation in_____ spectroscopy?
A. Infrared
B. Nuclear magnetic resonance
C. UV-Visible spectroscopy
D. Atomic absorption spectroscopy
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