BP106T Practical Experiments & Viva Questions
Comprehensive practical laboratory experiments and frequently asked oral viva voce questions with model answers for Introduction to Pharmaceutical Inorganic and Analytical Chemistry (BP106T) following PCI 2026 academic standards.
🔬 Prescribed Laboratory Practical Experiments
Standardization of 0.1 M Sodium Hydroxide using Potassium Hydrogen Phthalate
Objective: Prepare and standardize secondary volumetric standard NaOH solution using primary standard KHP with phenolphthalein.
Performance of Official Limit Test for Chlorides and Sulfates
Objective: Carry out comparative limit tests on unknown salt samples against official IP reference standards using Nessler cylinders.
Assay of Aluminum Hydroxide Gel IP by EDTA Complexometry
Objective: Perform replacement/back titration with standard 0.05 M Disodium EDTA and zinc sulfate solution.
Preparation and Assay of Sodium Chloride and Dextrose Infusion / ORS
Objective: Determine sodium and chloride content using Volhard's argentometric titration method.
High-Yield Oral Viva Voce Questions & Model Answers
Why is lead acetate cotton plug used in the Gutzeit apparatus during arsenic limit test?
Lead acetate cotton traps and absorbs hydrogen sulfide (H2S) gas impurities which would otherwise blacken the mercuric chloride paper and cause false positives.
What is the reason for combining aluminum hydroxide with magnesium hydroxide in antacids?
Aluminum hydroxide causes constipation, while magnesium hydroxide causes laxation/diarrhea; combining them neutralizes gastrointestinal side effects and balances onset of action.
Why is starch indicator added near the end point in iodometric titrations?
If added too early, high iodine concentrations form an irreversible starch-iodine complex that does not dissociate easily.