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.

複選題17. Which of the following statements correctly distinguish among the three quantification methods?(A) The external standard method assumes that the sample matrix has no effect on the analytical signal, and uses a calibration curve generated from standards in a clean matrix.(B) The standard addition method is best when matrix effects (biological fluid like blood serum) are suspected.(C) The internal standard method requires that the standard be the same compound as the analyte, and requires plotting the ratio of analyte signal to internal standard signal.(D) The internal standard method compensates for variation in sample preparation or instrument drift, which is suitable for the GC-MS method with inconsistent injection volume.(E) The standard addition method requires a separate blank matrix for calibration and then plots signal versus added concentration to find the original concentration.

18. A researcher compares the average amount of daily screen time between teenagers and adults. Which of the following statements are correct? (A) The null hypothesis would state that there is a big difference in screen time between the two groups. (B) A very significant t-test result (p < 0.01) would suggest rejecting the null hypothesis. (C) A smaller confidence level would result in a wider confidence interval. (D) An F-test must be performed before the t-test to validate equal variances. (E) A high F value suggests the two groups have the very similar daily screen time with a lower Q value.

19. Environmental scientists monitor water pollutants using UV-Vis and IR spectroscopy. Which of the following reflect appropriate uses of these techniques? (A) IR can quantify nitrate contamination in water by its characteristic absorbance. (B) IR spectra help identify functional groups like $-\mathrm{OH}$, $-\mathrm{C}=\mathrm{O}$, or $-\mathrm{C}=\mathrm{C}-$ in water pollutants. (C) Adding acid to the water leads to a blue shift in UV spectra of a pollutant, suggesting it's becoming less reactive or less conjugated. (D) Absorption increase in the UV spectra may indicate a breakdown of the dye structure. (E) IR can monitor the dye concentration over time using Beer's Law.

20. A patient with kidney stones is prescribed a citrate-rich drink to help reduce calcium oxalate precipitation in the urinary tract. Considering the solubility of calcium oxalate ($\mathrm{CaC_2O_4}$), which of the following statements are NOT true regarding how pH affects its solubility and the equilibrium involved? (A) Lowering the pH increases the solubility of calcium oxalate by protonating the oxalate ion ($\mathrm{C_2O_4^{2-}}$). (B) The solubility equilibrium includes both the Ksp expression and the acid-base equilibrium of oxalate. (C) Raising the pH causes calcium oxalate to dissolve more readily due to increased $\mathrm{OH}^-$ concentration. (D) Adding EDTA can shift the dissolution equilibrium toward more dissolved ions. (E) The mass balance expression: $$ [\mathrm{Ca^{2+}}] = [\mathrm{C_2O_4^{2-}}] - [\mathrm{HC_2O_4^-}] + [\mathrm{H_2C_2O_4}] = \text{solubility} $$

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