Q. In mass spectrometry, what does the term 'fragmentation' refer to?
A.The separation of ions based on mass
B.The breaking of molecular bonds to form smaller ions
C.The ionization of molecules
D.The detection of ions
Solution
Fragmentation in mass spectrometry refers to the breaking of molecular bonds to form smaller ions, which helps in identifying the structure of the original molecule.
Correct Answer: B — The breaking of molecular bonds to form smaller ions
Q. In qualitative ion analysis, what does the term 'selectivity' refer to?
A.The ability to detect multiple ions
B.The ability to distinguish between different ions
C.The speed of analysis
D.The cost of the analysis
Solution
Selectivity in qualitative ion analysis refers to the ability to distinguish between different ions in a mixture, which is essential for accurate identification.
Correct Answer: B — The ability to distinguish between different ions
Q. In UV-Vis spectroscopy, what does a shift in the absorption peak indicate?
A.Change in concentration
B.Change in pH
C.Change in molecular structure
D.Change in temperature
Solution
A shift in the absorption peak in UV-Vis spectroscopy often indicates a change in molecular structure, such as the formation of new bonds or changes in electronic transitions.
Q. What is the primary purpose of using ion chromatography in qualitative analysis?
A.To separate ions based on their charge
B.To identify the presence of specific ions in a mixture
C.To measure the concentration of ions
D.To determine the molecular weight of ions
Solution
Ion chromatography is primarily used to identify the presence of specific ions in a mixture by separating them based on their interactions with the stationary phase.
Correct Answer: B — To identify the presence of specific ions in a mixture
