Basic Aspects Flashcards
Which of the following statements about analytical balances is true?
A) Analytical balances are less accurate than general purpose balances.
B) Analytical balances are accurate to ±0.01 g.
C) Analytical balances are used for weighing large quantities.
D) Analytical balances are accurate to ±0.0001 g.
E) Analytical balances are not used in pharmaceutical analysis.
D
Which of the following statements about the use of pipettes is false?
A) Pipettes are used to transfer exact volumes.
B) Pipettes should be filled so the bottom of the meniscus is on the line.
C) Pipettes should be heated to ensure accurate measurements.
D) Pipettes have markings similar to volumetric flasks.
E) Pipettes should not be blown out unless marked BLOWOUT.
C
Which of the following statements about volumetric flasks is true?
A) Volumetric flasks are used for approximate volume measurements.
B) Volumetric flasks should be heated to dissolve compounds.
C) Volumetric flasks are used for making solutions to a specific volume.
D) Beakers are more accurate than volumetric flasks.
E) Volumetric flasks do not need to be calibrated.
C
Which of the following statements about the importance of accuracy in pharmaceutical analysis is false?
A) Accurate measurements are not necessary for reliable results.
B) Accurate weighing is crucial for reliable results.
C) Accurate volumes ensure the correct concentration of solutions.
D) Inaccurate measurements can make precise work useless.
E) Accurate measurements are essential for quality control.
A
Which of the following statements about the significance of significant figures is true?
A) Reporting values to an inappropriate level of precision is acceptable.
B) Significant figures do not affect the accuracy of results.
C) Only report significant figures for measured values, not calculated ones.
D) The number of significant figures in a measurement should match the precision of the instrument.
E) Significant figures are not important in pharmaceutical analysis.
D
