TMA 2 CHM303 Inorganic Chemistry 111 Question and answer

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Question 1: which of these molecule will absorb infrared radiation?

A. Molecule with permanent dipole

B. Molecule with conjugation

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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

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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

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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

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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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