Instrumental Analysis Quiz

What is the main advantage of atomic spectroscopy?

• High selectivity

• Slow speed

• Low sensitivity

• High resolution

What is the purpose of nebulization in the atomization process of a solution sample?

• Evaporate solvent leaving analyte

• Convert molecules to component atoms

• Divide sample solution into fine droplets

• Convert solid analyte/matrix into gas phase

Why do the spectra of gaseous, atomic particles consist of well-defined discrete lines?

• Due to vibrational transitions

• Due to rotational transitions

• Due to electronic transitions only

• Due to ionization

What is the function of a monochromator in flame emission spectroscopy?

• Isolate and allow resonance wavelength to pass

• Convert solid analyte/matrix into gas phase

• Measure the intensity of radiation

• Atomization of the sample

Which type of burner consumes all sample volume in flame emission spectroscopy?

• Neither consume all sample volume

• Laminar flow burner

• Turbulent flow burner

• Both consume all sample volume

What is the main application of flame photometry?

• Qualitative analysis

• Quantitative analysis

• Both qualitative and quantitative analysis

• None of the above

What is the main difference between atomic and molecular absorption spectra?

• Atomic spectra are in the form of bands

• Atomic spectra have vibrational levels

• Molecular spectra have no bonds

• Molecular spectra are line form

Which part of the atomic absorption spectrophotometer is responsible for isolating and allowing the resonance wavelength to pass?

• Source of radiation

• Atomizer

• Monochromator

• Detector

What is the main purpose of the chopper in an atomic absorption spectrophotometer?

• Measure the intensity of radiation

• Atomization of the sample

• Isolate and allow resonance wavelength to pass

• Modulate the light beam

Which element is commonly used as an oxidizer in fireworks to produce different colors?

• Sulfur

• Acetylene

• Charcoal

• Potassium nitrate