6. Echelle gratings are often used in which type of analytical instrument?
(A) Simple infrared absorption spectrometers
(B) Fluorometers
(C) High-resolution atomic emission spectroscopic systems
(D) Colorimeters

7. Which of the following statements is an advantage of energetic inductively coupled plasma sources used in atomic emission spectroscopy?(A) Low chemical interferences(B) High chemical interferences(C) Ability to detect only one element at a time(D) Narrow concentration range

8. Which analytical technique commonly employs the Zeeman effect for background correction?(A) UV-Vis absorption spectroscopy(B) Atomic absorption spectroscopy(C) Gas chromatography(D) Mass spectrometry

9. Which statement best explains why a bathochromic shift occurs for a $\pi \rightarrow \pi^{*}$ transition when solvent polarity increases?(A) Polar solvents destabilize both $\pi$ and $\pi^{*}$ states equally(B) The ground state $(\pi)$ is more polar and becomes more stabilized(C) The excited state $(\pi^{*})$ is more polar and becomes more stabilized(D) Polar solvents increase the energy gap between $\pi$ and $\pi^{*}$

10. Which of the following statements about a quadrupole mass analyzer is TRUE?(A) A quadrupole mass filter generally offers low-to-moderate resolving power, typically around unit mass resolution.(B) A quadrupole mass analyzer routinely achieves ultrahigh resolving power exceeding 100,000.(C) Quadrupole mass analyzers surpass FT-ICR and Orbitrap instruments in mass resolution.(D) A standard quadrupole mass analyzer is designed to measure ions with extremely high $m/z$ values (e.g., $>10,000$) without special modifications.

11. Which of the following statements is incorrect?(A) Electrospray ionization is a suitable ionization method for analyzing protein samples.(B) Atmospheric pressure chemical ionization is suitable for the analysis of protein samples.(C) Matrix-assisted laser desorption/ionization mass spectrometry is suitable for the analysis of protein samples.(D) Fast atom bombardment is operated under vacuum.

12. Select ionization method(s) (electron ionization (EI), chemical ionization (CI), matrix-assisted laser desorption/ionization (MALDI), and electrospray ionization (ESI)) that are suitable for the analysis of thermal labile and polar analytes.(A) EI and CI(B) EI and MALDI(C) EI and ESI(D) ESI and MALDI

13. What is the main advantage of attenuated total reflection infrared (IR) spectroscopy compared with traditional transmission IR?(A) It provides higher resolution.(B) It works well for solids or films.(C) It increases the penetration depth of IR radiation.(D) It eliminates the effect of refractive index differences.

14. Which statement correctly describes how analytes are retained on different stationary phases in liquid chromatography?(A) In reversed-phase LC, hydrophobic stationary phases attract polar analytes through strong dipole-dipole interactions.(B) In normal-phase LC, analytes with higher polarity exhibit stronger retention because they interact more strongly with the polar stationary phase.(C) In ion-exchange chromatography, retention is dominated primarily by hydrophobic interactions between analytes and the stationary phase.(D) In size-exclusion chromatography, smaller analytes elute before larger ones because they cannot enter the pores of the stationary material.

15. Which light source is most commonly used in mid-infrared absorption spectroscopy?(A) Deuterium lamp(B) Tungsten-halogen lamp(C) Globar(D) Hydrogen lamp

複選題16. Which of the following statements about the sensitivity of test strips are correct?(A) Higher sensitivity means the strip can detect lower concentrations of the target substance.(B) A highly sensitive test strip is less likely to produce false negatives.(C) Sensitivity refers to the ability to correctly identify negative samples.(D) Higher sensitivity is ideal for early-stage detection.(E) Sensitivity is more important than specificity in a low-risk area for disease transmission.

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