4.Which of the following statements about UV-Vis spectrometry is correct? (3%)
(A) Absorbance （A）is defined a A = , where Po and P represent the power of the light beam that has passed through the solvent and the analyte-containing solution, respectively.
(B) Absorbance（A） is the reciprocal of transmittance (T); in other words, A = 1/T.
(C)The molar extinction coefficient in Beer's law in SI units is m²/mol.
(D)The molar extinction coefficient is characteristic of a molecular species and independent of the solvent.
(E)Beer's law accurately describes the absorption behavior of all solutions regardless of their analyte concentration.

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1.Given the following dataset: 7, 5, 9, 15, 11, 8, 10. Which of the following is correct? (3%) (A) Mean = 9 (B) Median = 9.3 (C)Variance (σ2) = 8.78 (D)Sample size (n) = 6 (E)Standard deviation (σ) = 4.11

2. The shaded area accounts for approximately what percentage of the total area under the curve? (3%) (A) 5.5% (B) 10.7% (C) 13.5% (D)25.4% (E) 68.2%

3. A research group at NTU had studied the effect of a potential anticancer drug X. In their randomized trial, one group of mice was given X and another group was given sugar pills (placebo). Tumor size in many mice had reduced, and they reported the p-value to be p = 0.02. Which of the following interpretation is correct? (3%) (A) There is a 98% chance drug X is an effective anticancer drug. (B)There is a 98% chance that this experiment can be reproduced by other scientists. (C) There is a 2% chance drug X is an ineffective anticancer drug. (D)There is a 2% chance to observe the tumor reduction results seen in this study even if drug X has no effect at all. (E) Ail of the above.

5.Which of the following statements about a Fourier transform IR spectrometer is correct? (4%) (A) It accurately measures the spectroscopic response one wavelength at a time. (B)It needs more time to acquire a spectrum than a scanning IR spectrometer. (C)It is usually equipped with a monochromator. (D)The absorbance at all wavelengths are measured simultaneously. (E)This type of instrument was named after the American physicist Daniel J. Fourier.

6.Which of the following description about atomic X-ray spectrometry is NOT correct? (4%) (A)X-rays are electromagnetic radiation with very short wavelengths (≤ 10 nm). (B) X-ray line spectra involves electronic transitions of the innermost atomic orbitals. (C) The K series refers to X-radiation as a result of electrons moving from outer orbitals of an atom into a vacant orbital of the K shell. (D)The Ka line is the result of a vacant K orbital filled by an electron falling from the M shell. (E)The wavelength (energy) of the Ka lines for molybdenum is independent of its oxid ation state.

7. Which of the following description about various forms of light emission is NOT correct? (4%) (A) Fluorescence and phosphorescence signals are typically measured at a 90° angle to the excitation beam. (B) In fluorescence spectra, the emitted radiation usually has a longer wavelength than the excitation radiation; this difference is called the Stokes shift. (C)The average lifetime of an excited triplet state is orders of magnitude shorter than that of an excited singlet state. (D)Chemiluminescence occurs when a chemical reaction generates an electronically excited species; this excited molecular species then emits light as it relaxes to the ground state. (E)Chemiluminescence is usually measured without selecting a specific wavelength for detection.

8. All of the following are spontaneous reactions that proceed to the right. Standard reduction potentials at 259C are provided for some half-cell reactions. Based on this information, rank the relative strengths of H+, Ag+ , Cd2+, Cu2+, and Zn2+ as electron acceptors (oxidizing agents) at 25℃. (4%) (A) Cu2+ ＞ H+＞Ag+ ＞ Cd2+＞Zn2+ (B) Ag+＞ Cu2+＞H+> Cd2+＞Zn2+ (C) Zn2+＞ Cd+＞Ag+＞ Cu2+＞H+ (D)Zn2+＞ Cd+＞ H+＞Ag+ ＞ Cu2+(E) There is not enough information to deduce their relative oxidative strengths.

9.Graphs shown below are data obtained by the following analytical methods (from left to right): IR, NMR, EPR, and MS. What are the correct x-axis labels and units? (4%) (A) Micrometer (um) - magnetic field (MHz) - magnetic field (G) - atomic mass unit (Da) (B) Wavenumber (1/cm) - magnetic field (MHz) - magnetic field (G) - atomic mass unit to charge ratio (Da/z) (C)Wavenumber (1/cm)- chemical shift (ppm) - magnetic field (G) - atomic mass unit to charge ratio (Da/z) (D)Micrometer (μm) - chemical shift (ppm)- Coulomb （C） - atomic mass unit (Da) (E)Wavenumber (1/cm) -chemical shift (ppm)- resistance (Ω) - atomic mass unit (Da)

複選題 10. Which of the following description is correct? (4%) (A) The solubility product constant (Ksp) of aluminum hydroxide (Al(OH)3) is 3 ×10-34; the Ksp of cadmium sulfide (CdS) is 1× 10-27. Based on this information, we know that Al(OH)3 is less soluble than CdS in pure water. (B) A glass of aqueous solution (100 mL) contains [Ca2+] = 2.13✖10-4 M, [F-] = 4.26✖ 10 -4 M, and 0. 781 g of insoluble Caf2 solid. Based on this information, we can estimate the Ksp of Caf2 to be ~3.9 x 10-11 (C) Even through the same chemical can sometimes exist in more than one crystalline form, e.g., CaCO3 can be both calcite and aragonite, they are always equally soluble. (D) The pKa1and pKa2 of methionine are 2.28 and 9.21. Based on this information, we know that methionine has the best buffering power (capacity) at pH 5.75 (the mid-point between the two pKa values). (E) The hydrogen cation concentration ([H+]) of a pH 6.5 solution is 5.0 ✖10-7 M.