Titrimetric Analysis
Acid-base, redox, complexometric, non-aqueous and precipitation titrations.
Short notes and cheat sheetSubject guide
Pharmaceutical Analysis MCQs for Pharmacy Exams
Titrimetry, spectroscopy, chromatography, pharmacopoeial assays and validation.
Pharmaceutical analysis is how the identity, purity and strength of a medicine are proven. It is heavily tested in Drug Inspector and FPSC regulatory posts, where sampling and quality control are part of the job, and in Pharm-D professional exams.
Instrumentation questions reward knowing the principle behind each technique and what it is actually used for. These pharmaceutical analysis MCQs cover classical titrimetry, spectroscopic and chromatographic methods, and method validation.
Topics covered
What Pharmaceutical Analysis questions on PharmaPrep cover.
Spectroscopy
UV-visible, IR, fluorescence and atomic absorption, with Beer-Lambert law.
Short notes and cheat sheetChromatography
TLC, HPLC and GC, stationary and mobile phases, and system suitability.
Short notes and cheat sheetPharmacopoeial Assays
Official assay methods and their indicators or end-point detection.
Short notes and cheat sheetValidation of Analytical Methods
Accuracy, precision, specificity, linearity, LOD and LOQ.
Short notes and cheat sheetHigh-yield Pharmaceutical Analysis topics
- Beer-Lambert law and its limitations
- Indicators for complexometric and non-aqueous titrations
- Normal-phase versus reversed-phase HPLC
- Validation parameters and their definitions
- Uses of IR spectroscopy in identification
Exams that test Pharmaceutical Analysis
Sample Pharmaceutical Analysis MCQs
Original practice questions with answers and explanations.
1According to the Beer-Lambert law, absorbance is directly proportional to:
- AConcentration and path length
- BWavelength only
- CTransmittance
- DTemperature of the solution
Show answer and explanation
Answer: A. Concentration and path length
A = εbc: absorbance equals molar absorptivity times path length times concentration. Absorbance is the negative logarithm of transmittance, so the two are not directly proportional.
2Which indicator is commonly used in complexometric titration of calcium with EDTA?
- AEriochrome Black T
- BPhenolphthalein
- CCrystal violet
- DPotassium chromate
Show answer and explanation
Answer: A. Eriochrome Black T
Metal-ion indicators such as Eriochrome Black T (or calcon for calcium at high pH) change colour when EDTA removes the metal from them. Crystal violet is used in non-aqueous titrations and potassium chromate in Mohr's argentometric method.
3The lowest amount of analyte that can be quantified with acceptable precision and accuracy is the:
- ALimit of detection
- BLimit of quantitation
- CLinearity
- DRobustness
Show answer and explanation
Answer: B. Limit of quantitation
The limit of quantitation is the lowest concentration that can be measured with acceptable accuracy and precision. The limit of detection is lower and only confirms presence, not a reliable amount.
Pharmaceutical Analysis FAQs
Why is pharmaceutical analysis important for Drug Inspector tests?
Drug Inspectors draw samples for quality testing, so they are expected to understand assay methods, instrumentation and how results are validated.
Do I need to memorise every pharmacopoeial assay?
No. Learn the principles and the indicator or detection method for each type of titration and technique; that answers most assay questions.
Which instrumental methods are tested most?
UV-visible spectroscopy, IR, HPLC and TLC are the most common, followed by validation parameters.