2. The end point for the Fajans titration is indicated by the (A) reduction of a colored indicator a
3. Which of the following statements about the activity coefficient is NOT TRUE? (A) The activity co
4. Which of the following statements are NOT TRUE regarding the properties of a buffer solution? (1)
5. Which statements are TRUE about the titration of a weak base B. with a strong acid?(1) At the equ
6. EDTA titrations of metal ions are pH sensitive. Which statements are TRUE?(1) At low pH, the amou
7. Two compounds were separated using gas chromatography. The retention times were 628and 642 s, and
8. In reversed-phase chromatography, which of the following statements are TRUE?(1) a polar stationa
9. Which statements regarding mass analyzers are NOT TRUE?(1) In the time-of-flight mass analyzer, l
10. The electrospray mass spectrum of an unknown protein consists of a series of clusters of peaks a
13. Which statements regarding the sample preparation procedure QuEChERS are TRUE?(1) QuEChERS stand
15. Which statement regarding an interferometer is FALSE? (A) Radiation from the source is split； so
16. Which statement is NOT true about surface plasmon resonance? (A) The angle at which reflectivity
17. The laser medium is irradiated with electromagnetic radiation. What is the function of this inci
20. Which detector can be used for infrared spectroscopy? (A) photomultiplier tube (B) photodiode (C