ACS Analytical Chemistry ACTUAL EXAM
TEST QUESTIONS & ANSWERS (A+
GRADED 100% VERIFIED) 2025 LATEST!!
Questions
1. In atomic absorption spectroscopy, the primary function of the nebulizer is to:
a) Evaporate the solvent to produce solid particles
b) Break up the liquid into a fine aerosol
c) Convert the sample into free atoms
d) Isolate the resonance wavelength
2. Which of the following is NOT a common source for UV-Vis spectroscopy?
a) Tungsten filament lamp
b) Deuterium arc lamp
c) Xenon arc lamp
d) Nernst glower
3. The Doppler effect in atomic spectroscopy primarily causes:
a) Hyperfine structure
b) Pressure broadening
,c) Peak shifting
d) Peak broadening
4. In gas chromatography, a split injector is used primarily to:
a) Prevent column degradation
b) Increase analysis speed
c) Handle high concentration samples
d) Reduce solvent tailing
5. The term "hyphenated technique" best refers to:
a) GC-MS
b) NMR
c) AAS
d) FTIR
6. Which detector for GC is highly sensitive to halogenated compounds?
a) Thermal Conductivity Detector (TCD)
b) Flame Ionization Detector (FID)
c) Electron Capture Detector (ECD)
d) Flame Photometric Detector (FPD)
7. The process of converting a sample into a gas of free, ground-state atoms is called:
a) Nebulization
b) Desolvation
c) Atomization
d) Excitation
, 8. In a mass spectrometer, the region where ions are separated based on their mass-to-
charge ratio is the:
a) Ion source
b) Mass analyzer
c) Detector
d) Analyzer tube
9. The most common stationary phase for reverse-phase HPLC is:
a) Silica gel (SiO₂)
b) Alumina (Al₂O₃)
c) Octadecylsilane (C18)
d) Cyano groups (CN)
10. The method of standard additions is used to:
a) Increase the sensitivity of an instrument
b) Determine the detection limit
c) Correct for matrix effects
d) Calibrate the wavelength scale
11. A molecule with a conjugated pi system will typically absorb in which region?
a) Far IR
b) Microwave
c) UV-Vis
d) X-ray
TEST QUESTIONS & ANSWERS (A+
GRADED 100% VERIFIED) 2025 LATEST!!
Questions
1. In atomic absorption spectroscopy, the primary function of the nebulizer is to:
a) Evaporate the solvent to produce solid particles
b) Break up the liquid into a fine aerosol
c) Convert the sample into free atoms
d) Isolate the resonance wavelength
2. Which of the following is NOT a common source for UV-Vis spectroscopy?
a) Tungsten filament lamp
b) Deuterium arc lamp
c) Xenon arc lamp
d) Nernst glower
3. The Doppler effect in atomic spectroscopy primarily causes:
a) Hyperfine structure
b) Pressure broadening
,c) Peak shifting
d) Peak broadening
4. In gas chromatography, a split injector is used primarily to:
a) Prevent column degradation
b) Increase analysis speed
c) Handle high concentration samples
d) Reduce solvent tailing
5. The term "hyphenated technique" best refers to:
a) GC-MS
b) NMR
c) AAS
d) FTIR
6. Which detector for GC is highly sensitive to halogenated compounds?
a) Thermal Conductivity Detector (TCD)
b) Flame Ionization Detector (FID)
c) Electron Capture Detector (ECD)
d) Flame Photometric Detector (FPD)
7. The process of converting a sample into a gas of free, ground-state atoms is called:
a) Nebulization
b) Desolvation
c) Atomization
d) Excitation
, 8. In a mass spectrometer, the region where ions are separated based on their mass-to-
charge ratio is the:
a) Ion source
b) Mass analyzer
c) Detector
d) Analyzer tube
9. The most common stationary phase for reverse-phase HPLC is:
a) Silica gel (SiO₂)
b) Alumina (Al₂O₃)
c) Octadecylsilane (C18)
d) Cyano groups (CN)
10. The method of standard additions is used to:
a) Increase the sensitivity of an instrument
b) Determine the detection limit
c) Correct for matrix effects
d) Calibrate the wavelength scale
11. A molecule with a conjugated pi system will typically absorb in which region?
a) Far IR
b) Microwave
c) UV-Vis
d) X-ray
