ANALYTICAL CHEMISTRY EXAM QUESTIONS AND ANSWERS
1. Which of the following compendium of official analytical methods you
would most probably see in a QC laboratory for a water treatment
facility?
a. JP
b. AOAC
c. USP
d. SMEWW: SMEWW
2. A 25-mL burette is filled with a solution and drained until the desired
volume. What would be the final volume if the lower meniscus of
the remaining solution lies 3.4 lines below the 22-mL mark?
a. 22.36mL
b. 22.358mL
c. 22.30mL
d. 22.40mL: 22.36mL
3. Which of the following is used for accurately measuring the
density of a fluid?
a. Pycnometers
b. Crucibles
,c. Graduated cylinders
d. Beakers: Pycnometers
4. You want to extract an organic compound from an aqueous
sample using liquid-liquid extraction with diethyl ether as organic
solvent. Which of the following statement is true about the
procedure?
a. The organic phase will form the bottom layer of the binary mixture.
b. A homogenous mixture will be formed.
c. The organic phase will form the top layer of the binary mixture.
d. A colored aqueous phase will be formed.: The organic phase will form the
top layer of the binary mixture.
5. In recording data, an analyst must:
a. All of the choices are correct.
b. Include information such as date of experiment and name of
person who performed the experiment.
c. Ensure correctness of entries.
d. Record numerical data with proper units and correct number of
significant figures.: All of the choices are corrects
6. What are the three essential attributes of a laboratory notebook?
a. Record what you did, record what you observed, always write
balanced equations.
b. Record what you did, write in complete sentences, the notebook
should be understandable by a stranger.
c. Record what you did in complete sentences, record each step
with the correct time stamp, place your signature at the end of
the report.
, d. Record what you did, record what you observed, the notebook
should be understandable by a stranger.: Record what you did, record what you
observed, the notebook should be understandable by a stranger.
7. Which of the following analytical techniques is an example of a
method for separating components of a mixture?
a. Spot test
b. Titration
c. Refractive index
d. Precipitation: Precipitation
8. When using the centrifuge, always:
a. Make sure that the samples on opposite sides of the rotator are
balanced in terms of volume/density.
b. Make sure that the tubes are not overfilled.
c. All of the choices.
d. Clean-up spills immediately.: All of the choices.
1. Which of the following compendium of official analytical methods you
would most probably see in a QC laboratory for a water treatment
facility?
a. JP
b. AOAC
c. USP
d. SMEWW: SMEWW
2. A 25-mL burette is filled with a solution and drained until the desired
volume. What would be the final volume if the lower meniscus of
the remaining solution lies 3.4 lines below the 22-mL mark?
a. 22.36mL
b. 22.358mL
c. 22.30mL
d. 22.40mL: 22.36mL
3. Which of the following is used for accurately measuring the
density of a fluid?
a. Pycnometers
b. Crucibles
,c. Graduated cylinders
d. Beakers: Pycnometers
4. You want to extract an organic compound from an aqueous
sample using liquid-liquid extraction with diethyl ether as organic
solvent. Which of the following statement is true about the
procedure?
a. The organic phase will form the bottom layer of the binary mixture.
b. A homogenous mixture will be formed.
c. The organic phase will form the top layer of the binary mixture.
d. A colored aqueous phase will be formed.: The organic phase will form the
top layer of the binary mixture.
5. In recording data, an analyst must:
a. All of the choices are correct.
b. Include information such as date of experiment and name of
person who performed the experiment.
c. Ensure correctness of entries.
d. Record numerical data with proper units and correct number of
significant figures.: All of the choices are corrects
6. What are the three essential attributes of a laboratory notebook?
a. Record what you did, record what you observed, always write
balanced equations.
b. Record what you did, write in complete sentences, the notebook
should be understandable by a stranger.
c. Record what you did in complete sentences, record each step
with the correct time stamp, place your signature at the end of
the report.
, d. Record what you did, record what you observed, the notebook
should be understandable by a stranger.: Record what you did, record what you
observed, the notebook should be understandable by a stranger.
7. Which of the following analytical techniques is an example of a
method for separating components of a mixture?
a. Spot test
b. Titration
c. Refractive index
d. Precipitation: Precipitation
8. When using the centrifuge, always:
a. Make sure that the samples on opposite sides of the rotator are
balanced in terms of volume/density.
b. Make sure that the tubes are not overfilled.
c. All of the choices.
d. Clean-up spills immediately.: All of the choices.
